I liked the look of the game! The way my brain first comprehended it was that it was actually a spaceship flying up a waterfall and there were just rocks falling off of the fall. Felt like one of those kung-fu training things you see in movies sometimes. ;)
It doesn't feel to me that the player is actually going up, and I really can't think on top of my head how I would make it look like it, but I just wanted to mention something that could be improved.
Not gonna lie, I spent a few minutes after doing the left-wall cheese maneuver just tranquilly staring at the screen and the moving space and rocks. It's really relaxing!