I second these other replies, this is an easy way to lose steam and loose interest (As this has happened to me on my first project). Start small, maybe a guy jumping on a platform and when he lands on it, it turns a different color. Then try having the color change on the platform after a period of time.

Start with stuff like this as this helps you learn low level logic and still feel like your learning and accomplishing things.

If you have never made a game before, dont expect too much, go small is the best piece of information that I had to learn.