I definitely felt a sense of acheivement getting to the end of it. Controls were responsive and the level design was good. Nice job :D

The core mechanic of keeping the momentum alive is pretty fun. The visuals are quite simple but I like the ripple effect. Would've loved to hear a tiny bit of audio. I'm not sure if I reached the end, I was at the filled tube-like thingy and not sure if I could build up more momentum to go really high. Overall, I enjoyed this and could see the core mechanic developed further into different directions. Good job!

The mechanics of the buoyancy was great. I might have gotten to the end after a kind of tube that went right to left, or if there was a way to gain speed there I didn't figure it out. It would have been awesome to have audio with it too, especially some queues on when you were being lifted up and not. Also if the surrounding world was less blocky or was contextualized into something that gave it a reason to be that blocky. Really interesting way to navigate a world though!

(I see you are both new to LD, so a tip: if you want more votes and comments, play, vote and comment on some others' games and yours will gain visibility)