Just use the mouse-pointer, and dodge the red parts. There are three levels, and you have to pass, to win the game. You cannot cross the level, with the cross sign. You have to go back to the blue circle, and recover Giga. Then you have to start all over, from the level you are.
I am thanking Scratch for allowing me for using the background, code, character, etc. I am also thanking Codakid for helping me to learn how to code.