Slow down the early game when creating a new world by forcing players to gather resources with their hand before chopping down trees.
Rudimentary adds the following mechanics:
Players cannot break logs with their fists, but instead need to gather flint, sticks and flax (obtained by breaking grass) to craft a flint hatchet. Rudimentary also provides a flint pickaxe.
Campfires are now unlit when placed down. Players can craft fire starters from sticks and flax to ignite them without having to acquire iron.
A slow blast furnace which requires a bit more work to get than a normal furnace. It is recommended that you make vanilla furnaces harder to get (e.g. using Privileged), otherwise brick furnaces don't make much sense.
The brick furnace is accompanied by a new set of brick blocks.
Rudimentary only depends on Fabric API, but a recipe viewer is recommended.