Add balloon animations only.
Tips on making one: Program the sprite to change fisheye effect by at least 0.1, and change size by at least 0.1 forever. Then it looks like a 3-D balloon! In order to make a 2-D balloon, you just need to do size. For 1-D balloons, you need to make a straight two straight lines exactly against each other( draw in vector for this )and make a smooth animation were the line goes up. If 1-D doesn't make sense, dont worry. You can do 2-D or 3-D.