Bit too early for Easter isn't it?

Heres my brainstorm for ideas about what to do for my Easter Game Project. We have been tasked to create a game design document for a Flash game with the theme of Easter. I think this is going to be my final idea, for now:

The easter bunny is trying to take over christmas and you've got to stop him. The game will be a side-scrolling platformer like the classic mario games. But you can't attack the enemies, instead you need to avoid them. But the 'interesting game mechanic' is that you've got to alter the level design in order to avoid the enemies, for example placing a new platform above an enemy so that you can walk over the top so it doesnt see you.

And here is a very quick 5 min sketch of what i might be planning to paint for our forum 'Halloween Challenge' for this half term.