Well, I just submitted an addon to the Nintendo DS software PictoChat that essentially turns it into a min-tabletop wargame. The geist is that you and another player in a local area have two bases and try to destroy each other's base... and I just forgot to add in some small detail that will most likely be exploited later. *Sigh*
Anyways, I've decided each time I design something I become too ambitious, so I'm starting to put a curb on myself. Lately I've been brainstorming something I call a Total Defence Game with a maximum of 12 units and is a Flash game. I've started to learn Flash and started to get back into Hammer.
1 more year til High School ends...!
Sounds pretty interesting, you should try Game Maker to test your idea's, this will likely grab interest in your submissions.
Nice one!