In fact, the games I tend to make progress on are the ones I can get testable as quickly as possible. Unfortunately, those are usually the least complicated ones (glorified MUDs, an x axis with only 4 possible positions, etc).

I do want to do bigger and better things, then I run into the same problem as CronoDAS. When I do start a bigger project, I can sometimes get started, then crash within the first hour and never return. (In a couple extreme cases, I lasted for a good week before it died, though one of these was for external reasons). Getting started is usually the hardest part, followed by surviving until there's something work looking back at. (A functioning menu system does not count.)