A fun idea, the art looks great in it's minimalism (though I did mistake some tiles for ladders)~
Movement is way overboard though: makes it hard to move precisely and I ran into things a lot because I couldn't stop. Reading the description I can see why you went for it, but with zero acceleration and at this speed it makes things harder than they need to be.
Which is a pity, because honestly there's little else I'd have to pick at (without being petty). Took me a while to realise I needed the mob with the red eyes, but that's more me being unobservant ^^;