The motion is determined by go to blocks, which may be why it is jittery. Also, it randomly switches to the other side of the screen and I'm not sure why. All of the motion is determined by one "go to" block and variables are easily changeable.
Why is this producing dopamine. How is this producing dopamine. This should not be producing dopamine. Made in a few hours. The DVD hits the corner every 260.4 seconds.