The Dink Network

Keep in mind the difference between making it bugfree and making it perfect. The things you mention there (freezes or kicks to Windows) are bugs, making it perfect it are small perfections that'll make the playing experience smoother and usually go unnoticed until someone places their finger on it. An example of what I did in my current work in progress: moving all sprites on a screen 1 pixel not to cause a black area with a choice menu that frequently appears on that screen

Edit: though, making it perfect also requires a high level of bugfree-ness.. somehow people still find little bugs but they don't interfere with the game.