This is one of the more interesting premises, had no idea Maple Seeds worked like that! Experience wise, it's pretty cozy, I had a huge skill issue getting used to the tuck-flare controls, but once I figured you generally want to stay up, then go down for the rings, it became a lot easier...
Ahhhh, I loved the general movement of how it moves, but I wonder if I would have liked to explore around and venture as a maple seed, rather than go for rings... It would have been a cool experience, just seeing the different bits of the environment. From what you have, the scenery looks pretty great!
From now on, whenever a game's 3d, I just launch on Chrome instead of Firefox, I wonder why it just runs better... Overall, great work!