I liked the sound design and the skeleton fights once they were sped up!
I would have loved a reset button as the first thing i did was get stuck in the door as it closed lol. Also it was easy to just push boxes against a wall which would also mess up the puzzle.
In general i would have loved to see a lot more of the puzzle space of the ability explored as it was currently only used in one or two puzzles. For instance being able to walk past skeletons while using the ability.
(though the skeletons and box pushing puzzles are a bit at odds in the design so i would cut the skeletons entirely and focus on the ability and action sokoban kinda gameplay with dodging bullets and spikes comprising the action.)
Oh yeah and the title splash art and capsule art for the game are very grainy, which was a bit offputting as a first impression (looks like it was made from downscaling an image without cleaning up the art?)