1,2,3 are used to select different guns. Different guns have different mechanics. Maybe I will add more in the future. Reloading is NOT a mechanic in this game, so don't assume so.
Yes, I know It has been forever since I shared a project with you homies, and I hope you enjoy. Feel free to borrow these scripts or sprites, just remember to give credit and share a link to your projects involving these in the comments below!