...10 dots (including you) are gathered on an mansion. But one of them (Not you) is a murderer. Watch the dots. when two dots bump into each-other, they will say "!". This can either be perfectly innocent, or the murderer could be stabbing them. If a dot comes in contact with the murderer, within a few seconds it will turn red and die. Your mission is to identify the murderer, use the arrow keys to chase him (or her) and kill him by using the space bar. If you kill the wrong dot, the others will kill you, and you definitely don't want to be left alone with the murderer...
credits to The_Dinosaur_Man.