Interesting concept, and well made too!
My big complaint is the pound sign blocks. I know they need to stay on the grid, so I don't know how you'd fix this, but moving them is really tedious and annoying. Like, I have to press E to grab the block, then tap left or right multiple times to move it (like, specifically I have to tap a direction twice to move the block one tile?), then I have to jump away to stop pushing, because if I press the arrows one too many times I'll block myself from the platform, and gotta be careful when messing around with the E key because the R key is right there... it's just really stilted and awkward for a game that controls really well otherwise.