So I mined everything in the area underground since I completed the game, except one diamond, stone, and iron. I wanted to have a zombie army, so I went out of the underground and came back, finding a ton of zombies that have spawned. So I gathered them all together, trying to kill them all. Every sweep of my gem sword made them go back 5 blocks! But then when I got to close to them, they one shot me and I died. I got the talisman and all the diamond tools, but I died to a horde of zombies. That's a funny ending in this game.
Also, I never made the boat* so lol.
I had 25 potions in my hand but only used one since the boss was very easy... I was disappointed for the boss battle since I thought it would be harder. I was thinking of grinding the boss and getting a bunch of rubies, but that never happened since the boss battle only happens once. RIP
Otherwise, I would say this game is GREAT and I love it.
*I made a boat beforehand when I played the game but I just left the map, because I thought you could just place down the boat and then sail away, like in Minecraft. But no.
I never fought the boss in the run I placed the boat on.