Hi
I have Beta 1 working very impressively on a Toshiba Satellite L130-133 (Notebook XP Pro) and an Advent 4211-B (Mini Notebook XP Home) both running smoothly.
Some suggestions:
Have the ability to set the speed of the Pan-Scrolling e.g. have it move at an almost un-noticeable rate, then it still has a proper screensaver effect with the background seeming to be static, but when you look at it after several minutes it has moved across the screen.
Have the lighting on the whole screen changeable not just the backdrop.
Have the register panel show the name (not your keycode as an earlier version once did

) who it is registered to.
Set "A" to bring info About the fish onscreen as an overlay, maybe with the fish selectable by magnified window.