Very challenging platformer. Wasn't able to get past the rising acid section, but the level design is really solid.
The acid section in particular is really unforgiving, because it seems like you'll never have enough time to get past the jump-activated platforms if you don't clear every obstacle on its first cycle.
I think I would have preferred it if the sections with checkpoints were broken up into individual levels. It's a little hard to celebrate after beating a hard section when you're immediately thrown into another one. It would also help with replayability.