I like this kind of games, so I was already hooked at the beginning. My only concern is the shrinking viewport, for me it was very annoying. Even if I had still time left, I just had no idea where to go because I can't se most of the screen. The game is already hard enough with the dimension shifting, no need to frustrate the player even more. But that aside, it's a very cool game, I really like it! :)