Concept is pretty nice, rapid switches between guns gives the game a speedy feel. Also nice job at visual effects for killing the enemies, it feels really juicy! The red arrow is also a nice QoL feature (though you may want to change its color in White House, since it blends with the floor)
The thing is when the gun isn't spawned near the enemy, it's basically the game over. I would add a weak default weapon so it would compensate the bad luck. Also introducing different enemy types as the game progresses, and making each stage a bit shorter would be nice for adding some fresh gameplay.