Suicide attacks

You take under his control of a hunter crystals. Accordingly, your main task is to collect them. And if more specific, then each level you need to find 20 of these crystals. But as always there is one thing - all the time you will be committed suicide attacks, so you need to always be on the alert and to eliminate them before they get to you. That's something the way it is. Keyboard and mouse control. Fun and pleasure!