Hidden Palace has just come across a prototype of a very ambitious unreleased game for the Sega Genesis, based on the popular 1988 anime movie Akira: https://hiddenpalace.org/Akira%20(Prototype)
The game’s current state doesn’t allow you to beat any level or the game, however you can try any level and switch between each by hitting Start during gameplay and going back to the level select screen. The levels themselves are very different and utilize completely different styles of gameplay such as racing, 1st person shooter and side-scrolling.
This game looks like it had the potential to be amazing and I really wish it was able to be completed. Between the level variety, cool cutscenes and cool storyline from the movie, it at least had the potential to be a big hit. For now, head over to Hidden Palace to grab the ROM and try it yourself!