A meaty platforming challenge, and the controls are sharp enough to carry it. Animation is spare, but the movements are juicy. Good music and sound effects, too. Really good game.
In the spirit of constructive criticism, I have two very minor suggestions. Firstly, the color palette is generally attractive, but I'm not a fan the dark blue blocks. They subtract from the clarity of the high-contrast presentation (since they belong to the foreground, but blend in more with the background), and waste a precious color to do so.
Secondly, while it's great that respawning after death is instantaneous and hassle-free, it would be nice to have at least a little bit of audio or visual feedback when the player dies. (E.g., sweat drops emitting from the player, or a little chime.)