Doctor Quack - Version 1.0 If you like Tetris or Doctor Mario, you will love Doctor Quack! Kill the bugs in the jar with your patented pills. The problem is that you know what will kill the bugs, but you don't know which pill you are going to get next. It could help, it could hurt. A game of logic, skill, and luck. Sixteen levels of infection, complete with placebos, and selectable difficulty.