Weirdly enough, I only found out about the movie "Sunshine" after I published the game. So it goes.
I didn't really consider the game as being kid-friendly until now; this is definitely a perspective I find interesting. I toyed with the "next player" rotating GM mechanic a bit, and the reason I settled on a first-to-act thing was both to keep the game closer to an improv game than a board game, as well as ensure that each subsequent GM would take their place only when they have something they feel ready and excited to present. However, no ruleset is fixed and the cardinal rule of all gaming is "do what's most fun", and I'm honestly just happy you've got something to springboard off of.
Thanks for the commentary! I'd love to hear the weird worlds you (and the kids) come up with!