First you have to create your character, their name, colour, hairstyle (afro, shaven, etc). Then you select the scene you want to play in: from the Pyramids to the Moon. Finally you can select the level of difficulty, from Granny to Extreme.
Cell Burst has various gaming modes: Capture-the-Flag, ol´Brawl and Survival.
There are also plenty of weapons, and you can even select the colour of the blood in the game, because when you get hit, that´s the only colour you´ll see.
So now you´ve realized that Cell Burst is an authentic arcade shooter game, where you just have to survive and destroy absolutely everything that moves.