I have plenty of writing and game design ability to bring to the table, but no art or graphic design to speak of.
I'll probably try to add some art, depending on my idea.
Don't worry to much about your "ability". You'd be surprised with what you're able to accomplish without much practice. Switch up the art style to help yourself out! (simple pixel art, minimal vector / line art, real life photos with niffty filters / effects on them, etc.)
If you want more advice - examples - help, let me know! Good luck :^)