Click on the letters. The "E" sprite turns, moves, changes color, talks, and changes costume. The "r" sprite turns, moves, uses pen, talks, and changes costume. The "i" sprite follows the mouse, makes clones, glides, talks, and changes costume. The "c" sprite accelerates, bounces, has an element of randomness, talks, and changes costume. The ":D" sprite talks, reacts to other sprites being clicked, and changes costume. Variables were used to accelerate the "c" sprite, have the ":D" sprite say something random, track which letters have been clicked, make the "r" sprite move an increasing number of steps, and make the "i" sprite's clones follow it at a random speed.
The C sprite was truly a challenge to program. There was a problem where it would go into the ground when moving too fast. To fix this, I not only had the sprite bounce when it was touching the light blue, I also had it predict whether it would go into the light blue on the next frame and bounce if it would.