Have you ever heard of Yoyo Games? It's basically a site to post games created using the Game Maker software. Here is a link to the site:

Yoyo Games

You can download tutorials to help you (I very much advise it-making games is practically impossible without them), then make and post the games for others to enjoy. If you are not much into programming, you can just play other games people have made. Here are some of my favorites:

Super Smash Bros. Rumble
Death Worm
Ancient Ants
Secret Agent Dorito