This is a fun and cute game. I liked the timer in the top right, I made it to 13min in before I had one too many spike deaths and had to take a break. The hand painted art style reminds me of the Yoshi games including Yoshi's Crafted World, and the cute sound effects and music reminded me of the game ilomilo, which was nostalgic for me.
My favorite powerup mode was the feather mode, because that was the easiest one to survive in. Since you asked for constructive feedback my constructive feedback would be to perhaps add a few more rest areas/safe areas that players can hit during long stretches of hard spike-dodging. On the one hand I can tell it's supposed to be a skill-based platformer, but on the other hand I just wanted to enjoy the cute vibes and story more than see the poor guy die over and over when I failed the hard jumps. Great game and very adorable!