There's no fire button, it's just two sticks and P1/P2 start buttons. If you were going to strictly emulate it on a tablet you might have problems because of an exploit-ish thing that's essential to high level play: If you just hold the stick in a direction, you fire at a constant rate, but you also fire instantly when you change firing direction. So you can get a lot more shots on screen by fluttering the stick between two positions. Relatively easy on an arcade stick but might be impractical on a touch screen or controller.
There's no fire button, it's just two sticks and P1/P2 start buttons. If you were going to strictly emulate it on a tablet you might have problems because of an exploit-ish thing that's essential to high level play: If you just hold the stick in a direction, you fire at a constant rate, but you also fire instantly when you change firing direction. So you can get a lot more shots on screen by fluttering the stick between two positions. Relatively easy on an arcade stick but might be impractical on a touch screen or controller.
my bad, I only ever played it once or twice on an emu. I knew there were two sticks, and I must have assumed there was a fire button.
controller could be a little tricky, a similar movement was a macro for katamari damacy, but it's doable.
on a touchscreen, yeah, forget it, I wouldn't even want to try...