Two worlds is a game, where you explore worlds. you'll start off in world one, then a while later you'll move on to world two. after world two will come a story... So, if you want to join the collaboration, just remix, change V1 to V2 or whatever, add what you want, yeah. It's...MOBILE?!
added - Intro (Thanks to noodle bot for some code, and Tokyo machine for music!) the ability to go up and down on the MAP with the scroll thing on your mouse. more sound affects.