Purple colorfulness is the name of the new biome. Large trees, mountains where emeralds can be found, and caves.
About the blocks: plastic is a light but very rare block. Used to create... the secret ingredient. It can only be traded. Purple bricks are more complicated. It is made of bricks, from which you can then craft a purple brick block. The dry purple mixture is already in the biome itself, so the block is simple.
The purple brick pickaxe is the only tool so far, and I'll add the rest later. It will be stronger than an iron pickaxe and well, a purple brick has also been added.
And finally...
A secret and rare item that gives you speed when you click on it.
