Use the mouse pointer/your finger to move the paddle left and right, and try to hit the ball with your paddle to get points. But DON'T let the ball sink into the acid.
This is a peaceful and stress free game. thanks to techwizard on youtube for the tutorial on how to make a pong game (but i only used a bit of the tutorial because i didn't know how to make the ball go in different directions depending on what direction the paddle was). Oh and btw thanks to griffpatch for a tutorial for the score counter