Gun.Smoke (Arcade) - 1CC 

Version: World
Gun.Smoke is a classic Capcom vertical western themed shoot'em up with really unique 3-button control layout. You can shoot in different directions using different shot buttons and combinations. It probably works well for arcade stick and manual fire but I did a very interesting autofire setup for my controller.
cdn.discordapp... - that's how I configured MAME autofire. Requiring to use two controller buttons for activating two in-game buttons allows for synchronized autofire when you want intermediate directions between left and upward shot or right and upward shot. 6 Hz autofire is good for stages but for boss speedkills you want more - and for this I dublicated autofire setup for 30 Hz autofire but I've added a requirement to use RB button. So it's basically a four-button system - same three fire buttons and I can hold shoulder button to use fire buttons in 30 Hz mode. Shoutout to ‪@roihu3m‬ for 30 Hz mode idea.
Excellent strategy guide by BIL - shmups.system1...