This is a really cool idea and is executed well! I had a hard time wrapping my head around the mechanics, but reading the description helped me understand it a little more. The graphics are simple but very polished and nice to look at, and the controls feel great.
Every time I pick up a blue crystal the screen goes black for a second, which makes it harder to understand what's going on, but from looking at the second screenshot I think that might be a glitch?
Either way, very cool and enjoyable game!