This was nice. Like FeatureKreep said, this is a very addictive but the controls can be wonky at times. The bounciness of player character felt nice at first, but just led to the jumping feeling inconsistant. My biggest gripe with this is actually the level design. Mostly in that this game requires A LOT of waiting, and waiting is not very fun. With how far I got, the levels also only used this concept in a very direct way of, get from A to B and the path is effectively just a line.
That being said, if you found some good music and added lines that can trigger things other than just jumps, this could be a pretty cool full game! Maybe mess with the sound design and you could have a rhythm based platformer!