1The source is a total mess, mainly because it was horribly Windowsy
2originally and that hasn't really been fixed yet. May even want to
3reindent the source to suit me, something I'd normally be very
4reluctant to do - but I've hacked this *so* much it might be
5justified.
6
7It may be possible for (completely invisible!) black Spinners to be
8created on level 16 or so. Need to check if that's the case and fix if
9it is. (A proper fix would be a little bit more tricky than it sounds,
10though. The color changes when hit, and is set in (at least) two
11different places.)
12