Build a Game Demo

I'd like to build a game demo which is based on the following: [login to view URL] The game should be online. In the demo it will contain: 15 non-usable buildings 5 usable buildings (which include entering a new room i.e. different screen). Additional graphics (trees, pavement, road etc) are to be designed. The users in the demo will be able to create a character through a sign up form and change the colour of the character's shirt.