Cool concept! Handles pretty good overall, the double jumps seemed to get a little "stuck" on occasion, either in the literal "Stuck on the geometry" way or in the "I jumped but then couldn't jump again for some reason" way.
The dash felt great to use, perfect boost of speed, not too much or too little. Only complaint there is that the cooldown felt a little long when needing to use it in quick succession to reach some platforms.
The lava did feel a little fast at some points, but most of the time I was generally moving too quick for it to be much of a problem until I overshot a jump and immediate fell in, hahah.
Other than that, just some minor visual glitching that might just be an issue on my end. Very cool game!