In that case, you might be interested in this small bit of shameless self-promotion. Last year, I ran a game jam where we all made WarioWare-style microgames in GBDK to be compiled into a singular ROM. (Here's the result: https://bownly.itch.io/microgames-jam-pak) I haven't figured out when, but I'd like to do another one sometime later this year. Sounds like it might be right up your alley.