Welcome to an exciting monster-shooting entertainment. But you need to be really brave for this challenge! You will find yourself in the castle inhabited by scary creatures. And your task is to fend off endless waves of cruel attacks. Are you strong enough to give a response to all these opponents? You will have to develop a really skillful strategy to remain alive in this hostile surrounding. Do not forget to control your energy level – if it falls to zero, you will fail. Kill monsters and restore your energy!