Interesting take on an Arkanoid game. I liked that everything is maintained in a consistent style; it looks like a finished product and plays nicely.
I found one thing missing: the inability to change the cube's trajectory after it bounces off the island. Also, I couldn't quite figure out why, but sometimes, even when the main cube wasn't flying around the screen, I couldn't use some of the active power-ups/items.
Good job!