I had a really hard time understanding the game even after the tutorial, thinking the enemies we're coming from my left or right, and not from the front. After discussing it with a friend and understanding the actual positioning (Space Invaders alike), I really got the hang of the game. Got to 5000+ score. Very interesting, inclusive and well executed concept! The sound effects are amazing, and hearing the shot going right by my side was thrilling. I would love to see how far this concept could be expanded to make a commercial game! Great job!