Before 3D became a thing in videogames there were some 2D games that attempted to simulate a 3D enviroment. Doom, 3D tetris and such. Those games usually gave me a headache while watching them, and in addition to that the color limitation makes it even more "annoying" to my eye. Your game would look awesome with more colors or even in 3D. I hope I explained myself good enough, maybe I just said more than needed. :P