What games are similar to this one?

[マルコ]

I was looking for more like this, can you guys recommend any? (well, maybe a little less obtuse than this one, I mean, certain puzzles are just too much)

[コトラ]

Environmental Station Alpha is probably the next closest one, the postgame content gets pretty obtuse (in order to start that, you must head to some big open rooms after defeating the final boss to meet some NPCs that will direct you towards the postgame goals, I'm only saying this since I believe no mention of it is given in the game at all).

[treehann]

Well the obvious answer is La-Mulana 2. If you haven't played it, it's a bit easier.

Spelunky was directly inspired by La-Mulana, though as you probably already know, it's a roguelike.

Yume Nikki scratches a similar exploration itch, though it's a top-down RPG Maker game, not a platformer.

Fear and Hunger is another RPG Maker game but the deep lore and brutal puzzle solving and difficulty are kind of appealing in the same way.

I made a puzzle game, Solumnoid[treehann.itch.io], which is like a streamlined version of La-Mulana's block puzzles. Very peaceful with a gentle difficulty curve compared to La-Mulana.

Lastly, one of my favorite puzzle platformers of all time is the indie classic Within a Deep Forest (have to scroll down here[nifflas.ni2.se]), which has unique physics and delightful exploration and puzzles.

This Reddit thread also has some recs.

[CPT Chthonbeard the Pirate]

One that I haven't heard here is FEZ, though there was a bit of a controversy involving the developer and the fact that he wouldn't develop FEZ 2.

[Blind]

Hydra Castle Labyrinth

[Ganbatte Castle]

Bunny Must Die is a lot more simple, but it's another metroidvania with somewhat similar humor, difficulty, and puzzle obtuseness.

[Rawkin]

Definitely check out "Full Quiet". Fits into the Metroidvania gameplay and is a lot of fun!