I can help you get your setup working.
I'm surprised that you say Racket doesn't have decent options in game dev, what about https://github.com/avelino/awesome-racket#game-development ?
I am using Guile with guile-hoot for WASM compilation. It would be a browser game, but if you want to use chickadee instead, maybe I can help you with that.
First, what is your operating system? Which lisp and game library do you want to go for? (Say, Guile + Chickadee?)