Micro Mages is a platform game for 1-4 players. Available on a real NES cartridge and many other platforms via emulation.
https://www.youtube.com/watch?v=ZWQ0591PAxM
https://www.kickstarter.com/projects/morphcat-games/micro-mages-a-new-game-for-the-nes
origin - https://www.pipiscrew.com/2018/09/how-we-fit-an-nes-game-into-40-kilobytes/ how-we-fit-an-nes-game-into-40-kilobytes