Thank you man, I really appreciate the feedback! This is very high praise! On the topic of the issue with enemies striking from the above the screen, I think I would agree. If I fleshed the concept out into a full game, it would likely be using levels focused on sprawling hallways, and enemies wouldn't be able to start attacking until in view. I think there's an interesting discussion to be had on design when it comes to the enemies' ability to behave when outside of the camera.