Keys? If you mean keyboard keys, there aren't any
Ah, I thought... It’s just that when I accidentally pressed the R key on the keyboard, the game seemed to “reset”, that is, as if I had restarted (this happens anywhere in the game, in the settings, main menu, weapon selection, editor and etc). And when I pressed the right arrow (at the moment when you can see how the cannon fires), the cannon starts firing, you release the key and it stops. I thought there were some keys. Okay, I'll know, thanks)