Antibody is an arcade-style 'puzzle' game that takes place in the human body. It's one part Tetris, one part DOTA, and one part Tower Defense. Control your body's immune system to repel invading Viruses and Bacteria! Learn vaguely accurate cell biology! Most importantly, have fun!

Check out the tutorial and periodic help messages at the bottom. Beyond that:

Click or use number keys to select items.
Click to place.
Right click places a beacon that attracts friendly cells.
Click a Helper Cell (turret) and hold to re-aim.

Postmortem/more details to come soon!