Thanks a lot! It seems many people get stuck on lvl 5... You got to think in terms of how the colors blend or invert. If you still cannot solve it and want to see the rest I can tweet you the answer :)
Thanks, I could solve it, and just finished the game. I loved it. If you are thinking of adding more levels it would be awesome, I really enjoyed it.
Glad you liked it! Im planning on adding more levels and releasing it for mobile in the near future :)