Need 100 golden walnuts to get into that special endgame room on ginger island west, but theres actually 130 total which is nice since you dont need all of them. Once inside youll see the completion tracker and that special order board for gem challenges, definitely worth checking those out when youre ready. Room has this fancy vending machine too that takes qi gems for some really good stuff, kinda expensive but worth saving up for.

The whole setup needs 116 walnuts total to unlock everything on the island, and anything extra can trade for more gems which is pretty useful. Getting those first hundred walnuts might take a bit but its definitely faster if you check around the island for puzzles, maybe interesting that the gourmand frog gives you 15 just for growing some crops. Keep an eye on your wallet though, since those vending machine items can get pretty pricey with the gems.