not the artist but i am 99% sure AI was used. Which i personaly have no problem with considering that all the art is reaaaaaly good so far. And that one person cant learn art, coding and all the other parts a game needs to be so good to make a game like this.
I am quite sure, even if ai was used which i am quite certain, the maker likes this game and you can feel it. And if i am wrong and it is just a cash grab, then it is still good enough to fool me. lol
And if i am wrong about the AI part, well, sorry but the bunnies dick looked quite Ai. so yeah.