The goal of the game is to kill as many creatures as possible by clicking on them within the allotted time. Taking damage from a creature deducts seconds from the timer. If the player survives long enough, a Samson Jr. will appear; shooting him quickly will yield 30 bonus points.
When the timer expires, the player is redirected to a web page that shows their rank, which is based their final score. This can then be shared on Twitter if desired.