C64 emulation is very tricky. Sometimes games run too fast, sometimes they don't run at all. The C64 floppy drive is a constant source of pain for emulation, as

C64 emulation is very tricky. Sometimes games run too fast, sometimes they don't run at all. The C64 floppy drive is a constant source of pain for emulation, as most games and software actually included their own drivers for the floppy drive to make it work better... Fiddle with the floppy drive settings and emulation configs around them. The other thing is that most games require a joystick, so make sure you've configured one in settings. That said, space bar or joystick button generally starts games, but not always.