If you touch the cop from behind, the cop would shoot a bullet. Nobody became ghost but the game would freeze.
Thank you for your game and visual educational tool! Next time I teach someone binary search tree, I would certainly let them play few level of this game.
I am not sure that this is a part of the challenge or not. Would you mind adding an inverted pyramid on the main screen so that players can tell which layers or even blocks the stars are in? Also, a sorting function for the given list would be very helpful.
Again, this is a very nice puzzle game. Thank you.