I've been working for more than a month on my current RTS game engine. I've probably averaged about 6 good hours of work a week on it. But it's coming along nicely. The hardest part is actually coming up with the game ideas and drawing the stuff. I believe the first release will be a Defense game similar to Onslaught 2. I've attached a screenshot, if you check my forum posts you can probably find demos of the current version.
Ideas for anything welcome. As well as comments.