Gave this game a try based on your comment that it was similar to ours, and I LOVE IT!!! So cool how similar and different the two are. I love how yours was "calmer" in terms of being able to take the obstacles at your own pace, but got a similar frantic feeling once you started "going out of control". I especially loved how getting a hole in your raft made air escape that pushed you around. The style and music were wacky and funny. Love love love.
Only tiny comment is that I wish I could restart the levels at any time with R rather than only after I had lost. There were a few runs I knew were doomed but had to wait it out before the game ended.
I want to play more levels!
(quick edit: I could see a bunch of modes for this, including a battle "joust" mode where you try to pop the other player's raft, or edge them out in a dangerous course. Clearly you got my mind going haha.)