Really cool concept, especially managing to pull off a 3D game with 3 colors. It was a little hard to understand what the voice was saying as well as feel my way around with the unpaintable walls. I did also find some weird section with a black cube that violated the 3-color rule. Very unique and looks like a game you could definitely continue and expand upon.
EDIT: Would also have liked a crosshair so it's easier to aim. Also the game doesn't capture the mouse so if windowed/second monitor u can accidentally click out of the game.