Interesting take on the theme but was quite hard to play due to the controls!
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Possibly a crosshair that the player aims at, it felt like the character wasn't aiming unless I moved my mouse in the direction to shoot, if you look up something like Hotline Miami gameplay the cursor is bound to the mouse and the player always aims there, so you don't need to move the mouse to shoot.
Did you add controller support? If so, the controls you have now probably work better on there.