there are many good touhou fan games. this is not one of them.

Good if you like unfair impossible games.

game design is a bit amateur. decent try though I guess.

Super cute art!!

Mind numbingly boring and unfair gameplay.

I love bunnies!!

I played on Normal difficulty and finished the game. Zero achievements given on normal difficulty which is dumb.

Graphics are alright but music is terrible. It uses the exact same synthesized guitar sound from the SNES sound chip on all the tracks and it's awful. Level design is kinda meh, and the bosses don't give you any powers after defeating them either.

There's Hard and Lunatic difficulty so I gave hard a shot. Nope. Masochist's dream.

hottest piece of garbage I've ever played.

The price is right, but the gameplay and level design ain't.

Admirable effort, but the enemies are spongey and tedious to fight and aren't arranged in interesting patterns. The whole point of this genre is to deal with tricky enemies while skillfully navigating the environment, and pushing yourself to see how well you can assess risk in vain attempts to speed run.

None of that here. Go play the free and infinitely better Mega Serval instead:

https://store.steampowered.com/app/2009720/Mega_Serval/

Before I'll jump into the bad points of this game, I'll start with some positive/neutral ones.

-Art
I think that the author overall did a decent job here, he managed to combine the styles of both Mega Man X and Touhou so that it feels like a regular Mega Man X game but with Touhou characters.
However I would say that some bosses from the Mega Man X and Zero series had overall more "alive" animations. Here, many bosses feel "lifeless" in terms of motion.

-Performance
I have no objections here, the game runs perfectly smooth and has no crashing or freezing issues.

-Soundtrack
Most of the soundtrack is a remix of existing Touhou music in a retro style, but many of them don't really sound special.
However, I did genuinely enjoy some of the tracks, but I definitely wouldn't buy a soundtrack for them.

-Story
I won't spoil it, but it works, I guess. There's no epic or deep storyline involved if you're coming here from the Mega Man X or Zero series.
I would say that the story is an afterthought for the most part, but it isn't terrible, just not really memorable.

-Gameplay
Oh boy, where do I even start... As someone who has completed multiple Mega Man X and Zero games, I didn't enjoy this game's gameplay at all. It feels like the author didn't seem to understand very well what made these games "click".

For starters, when starting the game for the first time, you have a difficulty selection of Normal and Hard.
That's good, isn't it? I would say yes, as well, but if you decide to play on normal difficulty, then while you're able to complete the whole game, you won't be able to earn any achievements/challenges.
Why? This is just purely alienating people with lower skill ceiling, so that they won't be able to unlock anything just because they aren't good at platforming games.
I understand restricting some of the achievements, like "Complete the game on the hardest difficulty", but why would you even restrict achievements like complete the game to the harder difficulties?
Ironically enough, achievements like dying 50/200 times are also restricted to the harder difficulties because reasons.

Now, moving on to our protagonist's movement/upgrades and other stuff.
For the most part, Reisen controls smoothly, there's no input delay and no "icy" movement, so the author did a pretty good job here.
However, as others have already pointed out, there's no double tap dash like in Mega Man X games, but you can rebind keys, so it isn't that bad. However, the author has said that he won't add it because it doesn't fit his playstyle? That's at least what I gathered from one thread in discussions where he himself replied.
As for upgrades, I'll be frank that they feel useless compared to upgrades from Mega Man X games.
Other than upgrading your max health and charged shot charging speed, most of the upgrades don't really do much to give you extra options like different weapons to deal with various enemies or even upgrading your evasive maneuvers like air dash, like it would be in Mega Man X/Zero games.
So no matter what, you still feel weak, even after fully upgrading Reisen.

Now, going to the stages themselves, if you played through the Mega Man X/Zero games and absolutely hated pitfalls and spikes, then it's even worse here.
A lot of flying enemies that in some cases, can tank charged shot and pitfalls/spikes that insta kill you on hard/lunatic difficulty.
It wouldn't be so bad if Reisen actually could have the options mentioned above, like different weapons to deal with them or even dash upgrades, but she doesn't have any of them, so enjoy your suffering of "Buster only" gameplay.
If you're playing on normal difficulty, then it's manageable since spikes don't instantly kill you anymore and damage received is halved, so it's kind of balanced considering that you don't get any extra options.

Going over to the bosses.
To put it simply, most of them aren't even fun to fight. They are either ball-busting hard or laughably easy, no in-between.
The reason behind that, is that the author simply decided that not all bosses require such thing as a predictable pattern or even telegraphing their attacks by doing certain animations before connecting the attack.
Most of the fights are pure RNG, as in, you have to just hope that the boss won't decide to use the worst attacks all the time during the fight.
Most of the attacks are also pretty dense in terms of projectiles and speed, so if you don't have some godlike reflexes, then be prepared to die a lot of times before finally the RNG shines on you to make the boss more tame than usual.
Reisen also does pitiful damage with her charged shot which combined with the fact that bosses have long i-frames after every shot, make every boss fight drag on for too long.
The reason behind that, is that lack of extra options also means a lack of elemental/weapon weakness for bosses, so you can't just pop up a certain element/weapon to deal extra damage to bosses.
Also yes, there are no subtanks, like in Mega Man X, so you have to do the whole boss fight on one health bar, so enjoy!
You could technically heal using the bullet erase for bomb, but the amount healed depends on the amount of bullets erased, so don't count on it really saving you in a bad spot.

As a closing point to my review, if you enjoy Mega Man X/Zero games, and you're looking for something similar, then don't bother with this one, it lacks the polish and enjoyment of these games.

And to the author, I don't expect you to rebalance the game or anything, but at least allow people to earn achievements/challenges on normal difficulty, so your game is more accessible to casual players.
With the way you did it, you're offering no replayability to them, since after beating the main game, they don't have anything else to do, because they aren't "skilled" enough, and I doubt that most of them would spend many hours to go through harder difficulties, considering that they aren't even that fun to play through for the average player not accustomed to Mega Man X games.

UDONGEIN X is yet another of literally thousands of 2D retro pixel platformers infesting Steam and lowering the average quality of all video games everywhere. Gameplay is just limited platforming with a focus on shooting and bullet hell style dodging. You have a dash move as well as the ability to shoot in a straight line. Surely the pinnacle of gaming. It's completely garbage from the concept, technical implementation all the way through to the lacklustre gameplay. The only reason this sold any copies is because it has an anime bunny girl in it. Heck, some of the reviews for this game, a lot of them in fact, are just the word "bunny" spelled badly. Well, I guess they found their target audience.

From a technical perspective, the game doesn't meet basic minimum requirements that most PC gamers expect as standard.

A choice was made to use obsolete, decades old retro pixel "art" as a substitute for contemporary PC graphics. It's unclear if this is due to lack of budget or talent, regardless, the overall visual quality of the game is extremely low as a result.

While there are options to change the resolution for the game, all this does is scale up the simplistic 2D art assets used to make the game, which makes little or no difference to the graphics quality. Without any other substantial graphics tweaks, it's not possible for gamers to improve the lacklustre 2D visuals.

The game only displays in a bizarre 1:1 aspect ratio. Like... do they own a completely square monitor? Has the developer never seen a computer before? This isn't really acceptable, and it's unclear why the developer couldn't format the game correctly. Another reason to avoid this.

While this is on PC, it has all the hallmarks and deficiencies of a console game, from the clunkier than needed control scheme to the less than cutting edge graphics. There's 10's of thousands of PC games on Steam, and PC gamers deserve only the best. This might not appeal to many gamers due to the lack of PC-centric design. It's unclear why this game was never accepted on the video game console appliances it seems to have been designed for.

Some of the defects in the game can be attributed to the choice of using the GameMaker Studio construction kit/toolset. This is a very poor quality toolset favoured by amateur developers as it's cheap and requires little in the way of development skill, but unfortunately has very limited capabilities. Just as you can't make a silk purse out of a sows ear, you can't make a great video game if you use a terrible engine. GameMaker Studio is most commonly used to make retro pixel shovelware and cash grabs.

A strong argument can be made that construction kits like GameMaker Studio should never be used to make games for profit, as the "developer", Bar Holographic Otaku has done here. These construction kits are intended to teach people some of the basic principles of game development, and to make small demos to pass around with friends. They're not intended to replace to actual work of real, professional game developers. So it's inappropriate when amateurs try to use these for profit, without any actual, real game development effort taking place. This doesn't result in products that have any real meaningful value for gamers.

These technical defects push this game below acceptable standards for any modern PC game.

UDONGEIN X has the comically over-optimistic price of around $5 USD (plus almost as much again for pointless cash grab DLC), it's not worth it given the defects and shortcomings with the product, especially considering the sheer number of completely free, much higher quality games on Steam.

Developer Response!

The developer has weighed in to inform everyone they didn't read the Developer Usage Rules for Steam "partners", or they deliberately ignored the part where Valve says:

Though it may be tempting, not every review needs to be responded to. A developer response will frequently draw more attention than the original statement, potentially turning a small issue into a much larger community discussion. It's also not a good idea to use this feature to refute customer opinions. Your direct attention can be seen as validation or a defensive attempt to silence your customers.

The developer, a Russian shovelware garbage pusher, violates Valve guidelines for developers for a trite personal attack. Apparently, because I applied the same firm standards to their garbage shovelware that I do to all games, I'm "having a bad day".

This is a weak psychological cope from a damaged individual. If I'm "not well", suddenly my game review is flawed and can be ignored. The developer does not have to face the harsh reality that they dumped a garbage product onto Steam. They can avoid the impetus to feel shame for their actions.

You can see the state of the developer here. Attack the reviewer to attempt to devalue the review.

The developers pointless, passive aggressive attack changes none of the facts of this train wreck of a game. My review stands unaltered.

hello<,

your game is too diffucly. please fix this

sincerely