Had some bugs with the crouching, and some jumps didn't feel right. The first spikes I passed them by crawling and didn't die, but bugged out. But loved the art and sounds! Maybe consider adding some ambience music? Nice puzzles and I think that with minor tweaks the game is 9/10.
Question: is the art made of tiles or are the levels premade before adding to Gdevelop? Really loved the design of the levels and the game concept.