While not the best of games, I really did enjoy this. It's mostly because it's easy to understand. I appreciate the sounds and designs. It seems like everything is about "Attack On Titan" recently. I even managed to get some medals! I will admit it was a bit redundant.
It did really motivate you to work harder. You got 0 points for everything! I assume you get some if you kill the monster. I'm not sure if the projectiles count as enemies. I mean, you can destroy them.