Originally the name of the game is called Crazy Money but it can be changed in the future. The concept of the game now is that you collect money to go through the next level. There will be colored doors that can only be opened with matching colored keys, monsters, obstacles to push, etc.

The game seems simple cliche of a game but literally it is designed to get my programming skill up to bar. However, I really would love it if you guys could give me ideas about what the game is all about. Remember the engine is currently in development progress so far is great, you can move character around, it detects against collision 100%, it stops moving when you hit walls, you can already collect keys and enter through doors, etc. So in terms of programming that is not the issue, what I would like is original idea that makes the game different than the other.

Requirement:

1) Fun and addicting.
2) Original and simple.

If anybody have any ideas they would like to share with me I am more than happy. Give me ideas of story, style of the game, character, objective, etc. Throw me anything you have in mind.

P.S "Please no ZOMBIES!"