Everyone is fleeing the Famine, my items can be Upgraded

Dismantle the pistol and reassemble it, and the pistol will have one more data:
[Pistol Lv.1: 0/5 (ordinary pistol)]
Fire a shot to gain a little experience, upgrade to a level and the range will double, and the final bullet can produce an explosive effect. , experience is reset every tenth level.
Disassemble the four legs and shell of the little turtle and reinstall them. The little turtle also has one more data:
[Turtle Lv.1: 0/5 (Ordinary turtle)]
Upgrade to a level and the size will double, and finally become a mountain and sea. Giant turtle!
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Traveling to a wild world of mountains and seas, you encountered droughts and plundering at the beginning.
Rely on the ability to upgrade items to kill the Quartet!