I've only played this a couple of hours so far, but since it is on sale and has no English reviews yet, I wanted to give my first impressions.

The game is very Indie, but it is fairly deep, with crafting, a good amount of skills to raise and large areas. You can craft armor, weapons, torches, crates, tools, potions, etc. but at least so far, there is no building of structures.

You do not dig the ground up or make tunnels. The ore and other resources are part of the background, and you dig/cut/chop them out, but it does not affect the terrain around it.

You talk to people in town (several of them you have to rescue first), and they teach you crafting, sell you stuff or give you quests (mostly kill x quests so far).

The controls are decent, and the key assignments can be changed. It apparently does not support a controller, but it really does need a mouse.

One kind of unique thing is that you will come across red versions of the monsters. If I understand it correctly, killing the red versions make all of that type of monster more powerful, with more xp and gold dropped also. So you can control when and by how much the game gets harder.

There are 11 gear slots, for armor, weapons, etc.

There are a few annoyances, but nothing I can't live with.

1) Some things seem to take too many "hits" early on. Trying to break down a crate takes like 30 seconds of whacking on it. The cannons are another thing that takes forever. It may be because I am missing most of the time. How I miss a stationary cannon 90% of my swings is the real question.

2) When you teleport back to town, you can't quit and then use the portal to go back where you were when you play again. You end up having to run back through that area to get back to where you were.

I had fun for the couple hours I played it. I'm right in the middle of another game, but I wanted to grab this while it was on sale and do plan to come back to it soon.

Lol.
This is obviously a game that was made by an individual (or a group of individuals) who has no idea how to make games.
I mean no harm, but this game picks tags like "rpg", "platformer", "crafting", "action" and fails very hard on each one of them.
Obviously, the author of the game put in some time and effort into it, but just learning basic Unity stuff and drawing a couple of sprites is just not enough.
Especially I laughed when I saw the "placement" of items. Why in the first place did you include that "qawed" (the angles of where to put a torch, for example) in the tutorial, if later on you need to place a plank and a box with a mouse cursor?
Next thing: first time you meet a "red mushroom" and you see where its health is displayed... Is it a game for aliens? I mean - you're fighting a mob at bottom of a screen. And his health bar is shown at the top of it. Since the sprites are quite small - it's impossible to look at those two at the same time. And you can't just go up-down with your sight, cause once you do - you'll miss a hit :D
And the whole game is full of such small mistakes - you bump into them all here and there. For example - you have 2 first mobs in the game: Mushroom and Red Mushroom. First one takes 4 hits till dead. As soon as you approach the Red one - you have to strike it like 20-25 times. The sprite is the same (just red tinted), the size is the same. Why is the enemy harder? Because disregarding it's the same monster, you start to miss critically on it (1:6 hit ratio). I would understand if that was other enemy type (ninja, blinking wisp, fleaman, etc.). But this... Uh..
Ok, we all have to start somewhere, and this game could be better. I've bought the game as a cherry topping during the sale and I can have no complains... WHAT?! The full price for it is 12 Euros?! Dude, original Terraria (which obviously inspired this heavily) is 9,99! I'm not a judge, but come on, are you serious?
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Long story short: if you're looking for some inspiration on what games are out there, that were made not by "code overlords" or by studios, etc. - like if you want to look at game made by regular person like you and me - you may want to pick it up during the sale (I do believe that -90% discount is the fair price for this one). Otherwise...

Immediate refund.

I'm fine with a game being somewhat unpolished (bad control scheme, no controller support, etc) because I have a Steam Controller which smooths that out wonderfully.

What I am not fine with is having a big part of the game (mining resources by hitting them with the appropriate tool) essentially be a huge waste of time. To break a resource container open, you hit it about 20 times. Just standing there and holding the Attack button and watching the weapon swing over and over. Its like 10 seconds for a small container and 15 for a large one. The designer needs to be forced to stand in the sun and break real rocks for hours to see how tedious this is.

I refunded after 6 minutes. I will not play this until it's remedied, if it ever will be.

Still don’t know how to change class