SB737 plays Minecraft where smelting items gives overpowered gear.

Using redstone, hopper minecarts, and precision timing, I designed a massive auto-smelting factory that melts through stacks ...

You can make glass in Minecraft by smelting blocks of sand, and combining the glass with other items can craft even more.

You can make green dye in Minecraft by smelting pieces of cactus, and then use that dye to color other items or make more dye ...