If you click the button that says "You tell me how many sides and I will draw it" then you input a number of sides and it will draw a regular polygon with that many sides (like if you input 3 then it will draw a acute triangle). If you click the one that says "I will follow the arrow keys" then if you click the up arrow key it will draw a line up down arrow key it will draw a line down etc. If you click the one that says "I will follow your mouse" then wherever you move you mouse (for mobile devices that's your finger) it will draw a line in that direction (like if you trace a 8 with your mouse then it will draw a 8).
This is a school project. I am doing a collaboration project. I am working with @noodsrock. You might have to click the green flag 2 times.