Yeah, I didn't really do much in the way of tutorials. I really didn't want to mess up the player moment of just trying stuff and find out what happens. But in general, shields are very important when about to be hit. The Heavy uses a gun, the Recon uses a missile, and the Assault uses a sword, and their ranges are similar to yours.
Have you ever seen a movie called Source Code? It has similar kind of "Main character trapped in a thing" vibe. I was thinking about it a little as I was making this.