This report describes my degree project. For my degree project I made a demo for a game idea that I've developed, and implemented for use with Xbox 360. The idea was about converting the feeling and gameplay of old 2D side-scrolling platform games into 3D, viewed from a first-person perspective. The Xbox 360 version of the demo was also submitted for the game competition Swedish Game Awards. In the report, I explain this idea more extensive, what software I used to implement it, and how I implemented it. Finally, at the end I clarify the results and discuss fulfilled tasks and future improvements.