Why are people complaining?
The game isn't hard? It's simple. And it's easy to understand. You're a glass fish. Something hits you, or you hit something and the glass smashes. How does that not make sense?
Anyway, controls were fine too. Especially since you're in the water, and added extra challenge into the game having the move all over the place to dodge things.
I liked the music too, and how the game had it's own beat to the music. I can imagine it would of been tough to programme or even do, if only people thought about this insted of complaining about how they die every 5 seconds.
The medals wern't hard to get either, and they are fun and require you to actually think to get them.
Anyway, well done with a nice game.