You will get 1 block every level. You can place blocks on any type of clay.
There are 2 types of levels:
1. Levels that you can't complete without using blocks.
2. Levels that can be completed without using blocks, but you can use them as support.
If you want to restart the level - drop a button.
If you want to choose level - drop a barrier.
You will unlock the Hard Mode after completing every level.