Toxy on 22 September 2015
Stage themes: Ice, desert, poison, forest.
Enemies: Dino-Rhino/Torch, Rex, Shy Guy, Angry Sun, Blargg, Chargin' Chuck, Fishin' Boo/Lakitu, Pokey, Super Koopa, Spike (this enemy could be used to make awesome Donkey Kong-esque levels), Sumo Bro.
Hazards: Ball 'n' Chain, Beak Pillar.
Allies: Dolphins, Baby Yoshi.
Power ups: Acorn Mario.
Options: Vertical levels, increase timer beyond 500 seconds (or option to remove completely).
Assets: Sloped landscape, ability to add water and lava to non-water (underwater) and lava (castle) levels.
That is what comes to mind anyways.
