Hello! I'm an artist who primarily works with pixel/polygonal graphics, and I'd love to help with environmental art/ui in your project (I could possibly work on characters but I'm less confident in my abilities there. I've got some samples of my art up on my github page here: https://coo29.github.io/ArtDump.
My schedule is a bit limited right now, but I'm free most evenings to work on projects,.
Already sent you a friend request on discord, can give some more examples or we could talk more about it there!