@ReadOnlyCat: Yes, I agree, the boss should be different at the end. I will prepare something.
@majikeyric: It's a 48x48 pixel blitter object, because all available sprites have been used for the (blue) background. But I only tested it with 68020 so far, so it might shrink a bit if it is too slow...
@Amigajay: Oh, you like that effect? It's on my buglist.
Thanks for the feedback, I like eab more and more...