No, its not cool really. Ai is for game mechanics, you make it yourself to program an entity. You don't use it to generate images or a whole game, ick.
Oh no!!! Thats fucking disgusting!! Oh that's horrible I'm so saddened to hear that. Making money off of stealing and destroying the environment is even worse than doing it for free. Absolutely horrible.
You made the pixelart, but cheaped out on the character avatars?? Please stop using ai, you're a fine artist, make pixelart of the characters or hire an artist.