Tower Stack by Potato Chan, is a game where you have to stack yellow logs on top of one another. You must align each block perfectly. If you do not, the part of the block that sticks out (in either direction) will fall off. This also applies to the very first block (against the elevated, purple floor) to some extent. Misalignment makes the next blocks shorter. Blocks slide in from the left or the right, and increase in speed as the blocks get shorter. Placing down a block is worth 1 point if you misalign it, and 2 points if you align the blocks perfectly. The game terminates when you fail to stack a block on top of the last one.