Just another classic 2D Platformer game

So I'm making a classic 2D platformer game (like Super Mario Bros). It will be on Android, iOS, and Windows app store .

Game Design
X is a professional boxer, and when coming back from Lonely Mountain after a self-training course, he finds out that all people has been imprisoned by robots. Now he is the only hope of humankind.
There should be 4 levels (with 5 sub-levels each) - represent the 4 seasons. X must finds his own way through robot army, mazes to meet M.O, the mother of robots, to convince her to leave in peace.
This is what I've done so far:

... [to be continued]