Like others commented, sticky keys on windows is an annoyance. The instructions went by too quickly, perhaps Next and Skip buttons rather than timed would aid this. I didn't understand why I died at first because I never turned on the light. Getting the light to turn off again was tricky sometimes. I didn't care for the entering codes mechanic, maybe it could be like Ikaruga where you keep the dodge and light mechanic, but you can collect energy powerups only when the light is off. Unique game and good graphics, well done!