ok so theres water u should be able to fish so the items im sugesting to add is coconuts,fishing rod,sulfur,fishes,strings,dirt,caves,shovel,bucket,drinking meter.
Sulfur should be only found on the top of the mountain, u need string and wood to craft the fishing rod, u need shovel so maybe u could dig underground to be a cooler game and thats all.. hope u get this and make this come true...