Controls:
  Arrow Keys- Move
  Enter- Go Nowhere
  Clear- BOMB!
 
Object:
  Kill the creatures ('e' characters) by making them collide and annihilate each other.
  Don't get hit.
  If only one is left, lure it off the top of the screen.

 
Warning: This gets slow in later levels. If you feel like optimising, go right ahead. It 
  could be made *much* faster by using matrices instead of list variables, but this eats 
  a good deal of RAM, so I haven't done it.