Yup. Finishing the last 10% of a game can often be the most grueling part, because now you have to wrap things up and make sure all the little nitty-gritty things that you may have temporarily foregone are taken care of. But hang in there; the finished product will be worth it!
FYI, I've come under attack by the dimmed screen of death again. This time its happening when I select something other than "Next Level" at the end of the level. My best guess is that you have a game attribute somewhere that's gone maverick on you.