Drag and click the balloon. You can also make it change costumes with the right arrow key. You also can inflate and deflate the balloon with W and S. 1,2,3 and 4 are used to change the background. (Sorry mobile people that you can't change the balloon's look, size, and change the background) Secret code is up,up,down,down,left,right,left,right to get a secret balloon.
Not made by me, it's made by my sister. She's adding new balloons and updating old balloons still. Side note: Don't drag the balloon off screen. If that happens then, click the R button that is on screen, if the balloon gets too big or too small clicking the R resets the size.