To help @dcreager with their upcoming presentation at StrangeLoop on concatenating languages, I've made a few changes to Varvara's Bicycle to make it usable as a presentation tool, by adding explicit controls to step through evaluation. It's more readable to unfamiliar eyes than beetbug which blankets the screen with numbers and opcodes.
https://git.sr.ht/~rabbits/bicycle
@neauoire love how playful it looks!