RetroPie
SUPER MARIO WORLD not working in Jessie
Did you try any other games ? pisnes is not the most compatible emulator - or are you saying this worked in wheezy and now doesn't ?
I don't know if it worked on wheezy. Only tried Jessie, but scoured the net for days for an answer and tried all sorts to get it working. The thing is without Super Mario Allstars + Super Mario World the emulator isn't useful at all really (Snes without Mario? Doesn't bear thinking about). Also the Raspberry Pi people are pushing Jessie hard and telling everyone to "upgrade" to it. Tried many Mario roms but all are the same. Space Invaders works though.
I never had it working in my tests. Some emulators just aren't dont support some roms.
Oh a real pity, I liked the fact it was standalone. The alternative is to install retropie which is massive overkill when building a Snes emulator.
Retropie is modular and you can only install the things you want on it if you wanted to: https://github.com/RetroPie/RetroPie-Setup/wiki/Manual-Installation
for bugs relating to pisnes btw (that are not related to RetroPie), you should probably report them to http://sourceforge.net/projects/pisnes/ - which is the main repository - this is a fork with a few minor build changes
Regarding modular install in retropie... well yeah sort of. You still have retropie/retroarch with emulation station sitting on top of it.
you don't have to use emulationstation. you only need retroarch for retroarch based emulators of course.
if you skip emulationstation though - you would have to handle controller configuration yourself (we do it automatically via ES + some external scripts)