Very solid, I appreciate the aesthetic. Really nice parallax effect, a few-beat pause after death before GAME OVER prints, good spritework. It's a nice atmosphere, only improvement might be some audio.

Good controls too, like a couple others noted. Responsive, tight, the jumping feels especially good (which I guess is a given, it is the mechanic, haha). Nice game!

Jumping + Running mechanics felt fair and tight, which can be difficult to get correct. I appreciated the game speeding up as time went on as well. Good job.

Nice little simple game, adding a bit of music or objectives might spice things up!

Very fun little game.  I think adding sound and some things to avoid would definitely help make it a more complete experience.  Also, I really liked that the player's moment would sync with the clouds. Made controlling the player very nice.

I think the sprite-ing was very good... crisp clouds are challenging (for me, at least).  good job!