I would say just try it. If you can master slash shot - jump slash switch to gun shoot - you can fight with guns. And sword you just need butterfly to be able to fight. I saw further down that you dont like that it is about glitches. But this is emergent gameplay. The devs never intended to create a game like this, but the players made it into our own thing by discovering all the glitches.

Edit. Even with out that there are so many guns and ways to play. I know some people who run around in gun games using only the dagger. Some people with a stun grenade and flamethrower, just press 2 buttons and the enemy vanishes without any glitches.