I know that some people use ai art because they couldn't afford an artist but there are alternatives, like drawing it urself (even if u have 0 experience) and slapping some stickers/images together, maybe use pixel art (its a bit easy to learn) or you could stick together some shapes, or get a friend who will draw for you! If you are not capable for these options then it's okay to use AI art as your last resort.

Wait i forgot to add smth, maybe the thumbnail isnt AI art and im just going insane, maybe thats an option too

There is already a topic about this. And I payed a commision to an artits to replace the thumbnail. 

This game is born during a 7 day gamejam. I cant spend time drawing with that small window to create a game. 

Read the rest of the threads to avoid repeat the same topic