That has been my biggest issue with doing anything on an emulator. There are a few of them out there that are exceptional at capturing the C-64 and its little nuances, but without a proper joystick that feels like it's from the 80s, the games don't seem right. Jumpman is a perfect example. The programming for its input and responses is something that you can't describe, it's just unique, but on an emulator it doesn't feel like the same game because I can't use my old Kraft joystick with it.