Zomballoons is tower (in this case hotel) defending game. You work as a doorman in a big fancy hotel. Zombies are approaching in waves from all sides of the hotel. You only have bow and arrow to stop them. Peasants are going to party on a hotel's roof and you need to shoot their balloons before they go off the screen.
In between each wave you may upgrade five things - stamina, speed, multi-arrow, draw speed, arrow power.
It's all up to you to stop annoying little bastards. Make sure you play all flours (waves) because at the end you need to fight hotel's boss. You'll be surprised when you beat him!