I liked the soundtrack, would make the loop a bit longer tho. I also found a bug where you could get stuck in a wall in a ghost mode and dodge all the "enemy" cubes. Maybe some extra graphic adjustments would come in handy. I could imagine some cute smiley faces on the "player" cube and some extra feedback when you dodge the "enemy" cubes. Or just learn with Unity 2D lightning and post-processing. You wouldn't believe how easy it is to make game look good with just adding lightning with post-pro. Anyway, could be a good mobile game.
TIP: If you struggle getting small amount of reviews, try building your game on web, so people don't have to download it. If you do that I promise the amount of reviews will increase ;)