Everyone is fleeing the famine, my items can be upgraded

Disassemble the pistol and reassemble it, and the pistol will have additional data:
[Pistol Lv.1: 0/5 (ordinary pistol)]
Fire a shot to gain a little experience. Upgrading to a level doubles the range. Finally, the bullet can produce an explosive effect. The experience is reset every ten levels.
Disassemble the four legs and shell of the little turtle and reinstall them. The little turtle also has one more data:
[Turtle Level 1: 0/5 (ordinary turtle)]
Upgrade one level to double your size, and finally become a giant mountain and sea turtle!
--------
Traveling to a wild world of mountains and seas, you encounter drought and plunder at the beginning.
Rely on upgrading items to kill everyone!