Good, but not brilliant
There are a few problems with this game, firstly the controls are not responsive enough; you can frequently get the problem of the maze moving back and forth, not at all getting to where you want it. I also found a bug on the first level with orange bricks; once you have collected the orange powerup - you can get stuck in a purple cube, with no way of getting out.
Although the concept is good I find both the graphics and the design confusing, possibly make it a tade simpler, make the music more fitting, and the game more playable.