I've given this 5/5 in all categories!! Why? Because if you factor in the limitation you set yourself in implementing the theme with the code itself, it massively magnifies your achievements in all areas in my opinion. No resources! Very little code! This is a fantastic experiment... PLUS....
This game is actually fun to play! There is skill involved, there is a score, and there is a learning curve.
I want this to win the Jam! I want this to win the Jam so so much. Well done!