The game  has two robots A and B.  The A robots is controlled
by the user and the B robot is programmed  by  the computer.
 The user wins if A can catch B before 13 seconds elapse.

each time the up(down) arrow is pressed robot 1 speed
increases(decreases) by 2 pixels/second and each time the right (left)
arrow is pressed, the direction of the robot rotates 15 degrees to
 the right (left)

Here is the actual program:
 

arrows 2 15

robot 1 [shape [size 0.3 [star 5]] speed = 20 rgt -100 0 ]
robot 2 [on  shape [size 0.3 [star 6]] speed = 19 rgt 100 0
every 2 [robot 2 [dir = dir + rnd 100 ]]
  ]

robot 1 [every 0.5 [if (rdist 2  <=20) [ bg blue

 jt -100 0 size 4 [wr "Human won"] robot 1 [hide] robot 2 [hide]
after 4 [stop]]]]