Congrats on using "2 Colours" as a gameplay element and not just a graphic choice! I thought the game was pretty good, a little rough around the edges but still very fun. If I could make a suggestion, I would say to make the player always shoot the opposite colour to the background instead of switching between the left and right buttons; I think the game would be slightly more intuitive that way.

Good idea here. The change of colors is not that useful, but the game is still cool.

That's a cool design idea.
The game seems a bit hard at times but it's pretty fun :)

Fun little idea. The game seems a little easy to exploit if you just click both mouse buttons at once, I'd solve that by adding so an enemy hit with a wrong bullet speeds up.