This is the concept I have for my game. Or I guess Zumi's game.
ZMM is if you mixed Sonic the hedgehog physics with smash fighting controls. So like Subspace emissary but with better platforming. The levels will be structured something like a Sonic Mania zone. And a sprinkle of Kirby level design. With each level having mostly unique enemies and gimmicks.
The game will have two campaigns. The main story mode with Zumi and her friends. The other, Crimson's Encore mode. Which will remix Zumi's stages and even add a few exclusive to this mode.
Playable characters for the story will be: Zumi, Kota, Rex, Xavier
For the Encore: Crimson, Abyss, Vixen.
Cynder will be in as a 100% completion reward by playing both campaigns.