The game is really pretty !
And the game is also super hard !
I really liked it (big fan of platformers), but there are a few things that bugged me... I think the respawning is just a bit too long, not long enough to be really annoying, but just enough to be noticed. Also I think the character has way too much inertia and landing on a single block after a long jump is quite painful sometimes.
Other than that, the sound design is good and fits with the aesthetic of the game and the levels are good (and hard).
Great job !