Thanks for the thorough feedback, I really appreciate you taking the time to test our game!
That's good to know that the feedback on teleportation is lacking. One idea I think that would make this really obvious is if the game froze when there was a successful hit, and there was a comical, physical swapping of the two characters (like you'd see them being moved across the space so it's not as jarring). It would also help slow down the pace of the game a bit since I noticed it can become just a game about how fast you can click to shoot.