You are spongebob. You must defeat plankton and save the world! Wherever you click is where you go and R is to fire. The health bars are at the top and if the black bar that represents either person touches the middle then they will die. The one on the left is yours and the one on the other side is planktons. Plankton will attack you back with his laser beam.
You will regenerate health every 30 seconds but plankton does not. There are some Easter eggs for you to find. Also plankton has a lot more health and does more damage. Also you will have to click the flag about 5 times to play again. Also the easter aren't really Easter eggs but just an update I'm working on that isn't finished.