It's a really interesting game! Bulbie is really cute, and the different animations are adorable. It's a shame there aren't any elements to indicate when damage has been taken, it might be interesting to add some!
I noticed a few bugs while I was playing: if I jump and touch the edge of a platform while jumping, I can jump forever. If I fall when I'm trying to jump, I can hover (I don't know exactly what triggers this bug). Sometimes Bulbie gets stuck on his return-to-ground animation after a jump, which prevents him from jumping again. You have to move to finally reset the character (I don't know what triggers this bug).
But all in all, it was great to play it, and I'd love to see your other levels and other mechanics implemented!