Thanks for playing, and I'm glad you like it! I had fun with Coreboys when you linked it a couple weeks ago.
For the missing weapon, you may have pressed B/Circle/Tab (Xbox/Playstation/PC) at some point, which holsters your weapon. There's a bug where it still registers as holstering if you back out of some menus, which I'll have to fix at some point. For now I'll add the controls to the game page. Improving the sound effects and fixing the player's friction are good suggestions, and things I'm looking to do (there's another issue with friction where you can walk up anything that's not completely vertical).