A very, very unique and cool concept!
I like this cool black-white style and the way you fixed the problem of the player just walking back in the goal with the green thing is just so cool and added on to that it makes the game much more difficult. Another thing are these systems and although the map was so small you put a lot of features in everyone.
The only thing that I would change a little bit is the difficulty, because its a very complex system and also very hard so maybe tweak it just a bit.
Otherwise your game is just brilliant. Well done!