Amazing! This is the perfect example of a simple game loop combined with a creative idea executed perfectly! I love that the game naturally has a built in difficulty mode just based on what rocket you want to reach (easy = down, normal = left/right, hard = up)! Outside of maybe some graphical upgrades and music, the only real suggestions I have would probably be:
- More powerups
- Maybe a quick "lerp-spread" at the very beginning of levels (so you don't have to wait so long for the blocks to spread)
Bravo! I seriously hope you expand on this idea! One of my favorite entries so far!