In the nigh with a hat on your head, you try to destroy incoming zombies. But you have no powerful weapon but only a boomerang.
The beginning is easy, you face weak enemies, but you still have to learn how to throw and plan the path back. Later, more powerful things arrive, so collect coins for upgrades in the shop that is open between levels, which are really numerous. Enjoy this fine game with plenty levels and a bit repetitive content.