I've noticed that Zone needs some work when it comes to effects.
For example, compare the flamethrower on zone (attatched) to a flamethrower in real life.
Would be nice if Zone's looked something like that.
I've also noticed that bikes no longer give off a huge cloud of smoke once they explode. What's up with that? Bikes should also give off a small amount of smoke when they have low hp.
On Arctic, you should be able to see the player's breath. When HP is at red, the player's breath should be seen more often (because they are breathing more heavily + faster).