You are moving the mouse so fast it jerks
Wikianswers isn't a game, but it is 100% virus free.
Some people can become addicted and play them so much that it negatively impacts their lives.
they're fun and addicting but you better watch out they can distract you and keep you from doing homework
Staring at a computer screen for too long a period can give you a headache. Playing video games might relax some people while it may excite others. 2 or more hours can damage your eyes