In Roblox Giant Simulator, you swing your sword to gain xp. You can buy more and more swords to gain more experience and to become more powerful. But the real way to get strong is with the Wild West event that is going on right now. You can spend some robux and get some very overpowered pets which will allow you to level up fast so you can rebirth and make billions of gold which you use to purchase even stronger weapons to help you gain millions of levels