Firstly, tried installing EmulationStation – got errors when trying to start it.
Then tried making a RetroPie SD card to boot from – worked – but wanted a more elegant solution.
Installed pisnes – a SNES emulator specifically designed for the Raspberry Pi. Installed fine, however when trying to run a few roms it stalled. Mario Kart works ok (but I didn’t remember MK’s graphics being that bad!)