I found that the fact that the blue guy goes the opposite direction to be very challenging for my brain to comprehend, by that I mean: I understand how it all works, but it was hard for my brain to know what buttons to press when trying to do blue-guy-controlling. This may be just because I'm pretty bad at all types of puzzles in general. I think to help dumb-dumbs like me fully grasp the concept, there should have been some extra really easy levels at the start to get my brain in that way of thinking before the actual challenges start. By the way, the game looks really good and the music perfectly goes with the gameplay and feel. It also felt really nice whenever I finished a level. Cool game.