For the people that are experiencing a glitch that the kids become invisible but still hit your tank until death, you just have to refresh the page. Please thumbs up this comment so everyone will be able to read it and fix the glitch.
Song from MOTHERF*CKERS UNITED
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 "Microbe Kombat"){kind=icon}
 "Kids Vs. Ice Cream"){kind=icon}
 "Level Up!"){kind=icon}
 "You are a..."){kind=icon}
 "Protector IV"){kind=icon}
 "Help! It's the Unfinished Shadow Game"){kind=icon}
 "Punk-o-matic 2"){kind=icon}
 "Corpse Craft"){kind=icon}
 "Valthirian Arc"){kind=icon}
 "DuckLife"){kind=icon}
 "Loondon"){kind=icon}
 "I wish I were the Moon"){kind=icon}
 "VVVVVV Demo"){kind=icon}
 "Factory Balls 3"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}