Ballistae were used a long time ago as ways to siege a castle or just for fun. This time, we are going to use a Ballista just for fun. Your objective is to pop the required number of each colored balloon. For example, the yellow may have the number five on it; that means you have to pop five yellow balloons. The controls are simple. Use your mouse to aim. Click the left mouse button and hold it down to power up the shot. Once it is where you want it, let go and the arrow will be released. Pop them all to move on to the next level.