That's slower than some get with an 030. What's the accelerator card out of interest?
One button joystick support - something I'll address in a future version yes. In the meantime, Megadrive/Master System pads work if you have one. Or obviously there's keyboard support too.
Interesting. And to confirm you're running the binary obtained from here, not the WHDLoad version?
It's always difficult to provide a guarantee of speed considering there's a lot of different configurations out there, but I would hope you were getting better than what you've reported. It sounds slower than I would expect.