Nice Game, I enjoyed it (completed it in about 10 mins).
I like the art style and the "Z jumping" mechanic. The levels are quite well done (it actually teaches you the various Z powers without any text, very good), but the game is too short. After mastering the first levels, we would like to see more complicated levels (I enjoyed the ones that combined both green and blue powers). So I'm looking forward for episode 2
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One complaint though: the blue enemy that flies and attack you is a bit annoying because you have to be very precise whit your jumps to kill it. I think you should make it a little bit slower because sometimes it feels punishing to restart a level 5 or 6 times so to find THE moment to jump and kill the guy.
Anyway, very good job on this game!