I’ll look into other joypads, I wasn’t aware of them. Have you completed tricky and hard? There’s a enemy in those modes which doesn’t even appear in normal.
I just completed in normal. I will try tricky if there is a new enemy :) What would be cool is to do something similar as Tiny Little Slug on Amiga regarding high-score. http://tls.apc-tcp.de/highscore-de.php
What happen there is that when the game is completed you get a code to type into a web-browser and you get on the high-score list :D