So basically I was thinking if you get all of the current upgrades, there are 3 more upgrades that you can get. Firstly, to get the second upgrade, you no longer need an emerald. Instead, you need to get 6 diamonds (not sure about that though) to get the second upgrade. To get the third upgrade, you have to get 3 emeralds. Unlike the other upgrades, this one gives you 1 diamond per 5 seconds. So you have access to bows if you isolate yourself after getting diamond swords and generator upgrades. The fourth upgrade changes that to 3 seconds, for 7 emeralds. (Again, not sure) Finally, you can get 1 emerald per 20 seconds if you get 64 diamonds. (one more time, not sure about the price)
Iām not sure about the prices so, please, suggest what prices you think they should be.