The best thing about AmigaBasic was the manual. I've still got mine somewhere....
As for the worst Amiga applications ever, there are a couple of others that spring to mind:
Kindwords - ran dog slow on My A500, and text would periodically "disappear" when editing stuff
Thexder (yes I know it isn't strictly an application) - Four colour CGA PC game on an Amiga? Look no further.
Oh, and on a nostalgic note, I too used AmigaBasic to help me with my A Level in Computing - ten long years ago now!