A topical suggestion following the recent Unity announcement:
Idea for a "big" project:
Make Racket and/or Rhombus a script language for Godot.
https://docs.godotengine.org/en/stable/getting_started/step_by_step/scripting_languages.html
A early experiments was created by @SamPhillips :
https://github.com/samdphillips/racket-godot-experiment
(thanks to @soegaard for suggesting this)