Ideas for my posible Game Project?

[John Doe 4]

Hello Everypony!
 

I'v been playing for quite a while now with programing and decided to add some colorful equines to the mix.

on the way I started practicing a little bit of animation and came out with and idea about a possible project for a game.

Though I just started learning and my animations are a bit rough, So far I have some nice results with character movements and control!

But the I started to think that this might become a real project.
 
Currently the overall idea is a 2D side scroller, much like Mario but a lot more.. detailed.
More realistic character movement and appealing backgrounds.

 

Images:

some snapshots from my demo faeturing aj for charecter movement

(some interesting information: red lines are colision boxes, the cyan box is the image, and is some realtime floating information about the current state and animation for debuging and to make it look cool)

 
I was thinking about an adventurous and challenging game
Have any ideas or suggestions about what the game should be about?

Edited August 30, 2013 by Mr.Nikomator