The EN/RU button in the bottom left corner switches the language. I should have made it more obvious 😅
Great ideas! I would definitely like to do something like this! I had more interesting ideas for bullets than the ones in the game, but I couldn't implement them. For example, a bleeding/poison bullet or a bullet that buffs the next bullet, which would be more strategic and help with "deck" building (or barrel building 🤔).