Switch lanes and dodge falling blocks.
Use the Left, Center, and Right buttons. Arrow Left/Down/Right and keys 1, 2, and 3 also move. There is no jump or fire.
Survive the longest. The run ends on the first collision.
Block Dodge is a three-lane reflex run. Blocks drop from above in the left, center, or right column. You occupy one lane at a time. If a block reaches your lane, the run ends on that first hit. There is no health bar to spend. The longer you last, the more the drops overlap, so you have to leave a lane before the block arrives rather than after it fills the column.
Place towers and hold six waves.