The art style and the music are nice and i quite like the bit of writing (relatable). The mechanic makes for fun puzzles.
The big negative aspect is the weird bug/feature (?) that the character isn't able to jump when anywhere near a movable block. which is weird. if you have a 2 high immovable ledge he can jump that up no problem but if one of those 2 tiles is a movable block he'll instead just hit himself against the wall as if he was detecting a collision that isn't there. That also happens if the 2 tiles are both immovable and there's a movable block 2 tiles back and 2 tiles up from him, ie: nowhere near him. this made the solution to level 3 quite arcane.
Also it's pretty short game, but that's to be expected for a game jam game.