1.use rpcs3-gun.exe to get into the game

2.when game loaded..then press space bar to access test mode

3.in test mode..use up or down to select.. use Enter to access what you choose

4.so select the I/O TEST press enter..then select GUN TEST enter..then press G 

  to adjust your mouse ..read message on the monitor

(any other setting you can choose free play and close 3D effect..ect)

5.exit the test mode..finally press space bar to go back the game

6.You can press Q to start the game..F to coin or already free play

7.mouse control..you can use 2P at the same time to use power shoot?

 left button:shoot  middle button:start or continue right button:strong shoot? not sure