If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Zombies waves are coming at you! Take them out piece by piece...
Click two zombie parts to swap them and create lines of 3 or more matching parts. Complete the level by clearing out all of the required zombie parts (shown alongside the zombie icon on the left tab) before you run out of moves (shown on the green bar at the bottom)!
This game is played with mouse only.