Good stuff

Although the concept isn't an entirely original one (I played a space game similar to this made on OOT ages ago), Quantum is a well executed, polished game. With a simple interface, there's isn't much difficulty learning what things do, although this may require some experimentation. With new things slowly added to allow the player to adjust (repel, bouncing tiles, warps), I would still suggest adding some sort of text explanation before the introduction of new objects. For instance, I didn't realize the yellow tiles allowed the ball to bounce until several levels after their introduction.

With only 20?? or so levels, I found the game way too short. Some levels had a high degree of difficulty and I almost gave up on a couple levels (namely level 13).

Level editor is icing on the cake, although I personally didn't feel like making maps even after beating the short game.

Overall, I enjoyed the game. Good work StapleGun.