This was good fun - congrats on your first non-visual novel game! Nice set of levels, which escalate the challenge and introduce new enemies/obstacles at a good pace. I enjoyed the cutesy-horror vibe to the experience :)

As you mention you're looking for feedback on the gameplay feeling, I had a couple of thoughts:

• In some of the earlier levels, it could feel a little tricky to line up the block perfectly with the small gaps in the level geometry.  Either making the gaps a little wider or possibly adding a slow mode for more precision that can be toggled on or off would be great 
• I'd love a few sound effects for deaths/stage completions just to add a little emphasis :)

Otherwise, looking forward to seeing where you take this with future stages!