Nice game! Feels reasonably polished, fast gameplay and occasionally you need to put a lot of thought into where you are going, which is good! I used the dash on the section where you should hit your head, which I don't think is intended but I managed to pull it off after a few tries. Some more use of the dash mechanic would be nice, and also (nitpicking) some nicer tiles for when you've walked over a block, but that's just polish.
Overall, good game! Well done :)