Gnawz, I'm pretty sure I know what the problem is - and it's not so much a DKC2/ZSNES glitch as it is a hardware limitation.
Your keyboard (like mine, actually)
seems to have a two-key rollover
. 'Rollover' is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. What's happening is the keyboard understands that you're holding a key for run
and a key for right
, but the keyboard is unable to interpret any more keystrokes, so when it comes to using a third key for jump
- nothing happens. Some keyboards support more simultaneous keystrokes, but using a gamepad is a better choice, if possible.
you might want to check out: Any recommendations for a gamepad?
And for future reference; all emulation related issues belong here
Hope that helps.