So this is absolutely incredible. The amount of time and creativity it must have taken is astounding. So in the first portion, you can clearly see numbers laid out at the very bottom. The players has the option of choosing to add two numbers by breaking the blocks above the designated numbers. The second part is just flat out chaotic. I had to watch it twice to really grasp what was going on. There is just shit flying everywhere and once it's over, the sum of the two numbers you chose appears in ice blocks. The way it works is that an initial shell falls through the first area. Depending on what blocks you broke (above the designated numbers), the shell sets off a chain reaction that leads to the formation of the proper sum at the end. Totally genius.