this game nails the atmosphere part and music / sound design , but i think the game part has some issues.
what is the point of not being able to move while shooting ? It takes a lot of depth away from the game , the reason for stopping to shoot ( like in resident evil 4 ) is to get yourself in a better position to get an advantage against the enemies - controlling the crowd , the problim in your game is that there are no physical objects that could be used as cover and the fact that the enemies move faster or at least at the same speed as you makes the moving around pointless . That's why the game becomes more like a rythm game where you have to mach the colors instead of a twinstick shooter