Hi what an interesting concept, very clever, well done.
I'll try again later but the game quit on me and the tab closed when I pressed Q to fire the gun in the gun level. I fired the gun once, wasn't sure to aim for the door or the red box above the door. Then when I fired a second time with Q, the browser (Firefox) on my laptop must have thought I was trying to quit and close the tab. Before that when I right clicked to fire it brought up the browser right click menu.