For the fourth exercise, I decided to code a particle system that would look lie sparks coming out of a wand. To represent a wand, I used a long brown rectangle, and to represent the sparks, I used an array of transparent colorful circles that quickly shrink away after they appear.
The start screen looks like this:
And once a player touches and drags the wand, magical sparks begin to fly!
I also decided to loop in a little magical sound to set the feel for the game.