Here's something that popped into my head recently. It's not necessarily an idea for a specific hack, but...
Has anyone ever attempted to hack Mario Paint?
I'd be curious to see what's going on under the hood. I bet there's at least some unrealized potential in terms of what can be created with it, like animation cycles beyond 9 repeating cells.
Might be fun to try to splice a different game into the "coffee break," too.
Is it even possible? Do emulators in general (and hacking emulators, specifically) have support for the SNES mouse?
Would anyone care enough, given what more can be done with readily available computer software, to check out the final product? probably not. It would be the kind of thing where the journey is its own destination, I guess.
I might have tried it if I had any time at all, but I don't even have enough to devote to working on any of my "current" works in progress.