Hi,
I know I might look a bit young(I'm 18), but I've been using game maker since 2007 to develop games for competitions as well as personal use. I live in Melbourne, and I noticed that you said you live in Australia so communication should be easy. I can get the project done this weekend, and I'm willing to discuss pricing further. It should take approximately 5 hours of my time to complete the game, so work around that as a basis for what you want to pay. If you want to assess my skills or see what an early version of the game might look like, send me the images and I can do a quick version. I look forward to working with you if you decide to let me make your game.
Will