Hi noframi, sure! I’d love to have you on the project. Honestly, I was hoping to find an artist like you someone who could bring a unique, unconventional atmosphere to certain parts of the game.
As for compensation, don’t worry: even though it’s an indie project, if it turns out to be a financial success, all contributors will be paid. Plus, you’ll retain your copyright and, of course, receive credit in the game! ^^