The game is really nice, thought I had the same issue as Samuel.
Set itch.io game page to have the option for full screen, because quite often moving the mouse around I clicked outside the game and I died.
The reloading system is nice, that remind me the First Person Shooter template I did, that reload rolling the mouse wheel up. I wouldn't have though the R button to reload. Right mouse click the first time to open the barrel, then right click again to put bullets as you have now. It will be easier for the brain to focus more on the game. Left hand only moves, right hand does all the gun work (aim, shoot and reload).
I liked the power up options I saw so far, though some sounds fair better than others, so the choice was "compulsory".
Definitely a game that you should complete and made it a commercial product.
Viewing post in Bullet Revolver jam comments
Yeah, I would if you can add an option to custom the input, that would solve the problem too. So every player can adjust the input as they want.
I just realised that I sell the template here on itch.io, but I don't have the demo of my FPS on Rails here.
Try it in the Scirra Arcade:
https://www.construct.net/en/free-online-games/test-demo-fps-rails-template-4963...
Go full screen before playing, otherwise you will have issues with the mouse.
To reload a single bullet for gun and rifle, move the wheel of the mouse up and down to imitate the real life hand movement.