Well it's not amazing... I have partial colour sight defficiency, so I couldn't tell the difference between colours A and S. Kinda sucks for me huh? Obviously most people are not freaky like me so they are fine, but you could've had very obviosly different colours... eg. Blue Red Yellow and... Black? Or something.
It might get a little boring too after a while. But maybe it's just not my type of game?
Still, I'll give it a decent mark because I think others might enjoy it!