I agree with the others who have mentioned TOTAN:
1. Change ruby award choices so that you can never collect two jewels. This should be removed completely from the game and replaced with a random item that is pretty good (light locks, 15 lamps or 3x bonus, 3 tiger loops etc.)
2. Add more difficulty (more hits required) to modes cyclops, Rox, and mabye flying carpet - adjustable in adjustments.
3. Fix exploit with Harem and genie battle.
Aside from the genie exploit, these appear to be pretty basic (easy?) fixes to implement.
It would be REALLY nice to add something to the modes that are just "go for the golden symbols," but that's probably asking for too much!