I feel that as you start to reach higher levels, it becomes very difficult to level up. In the high levels you need thousands of exp to level up. It just becomes tedious and repetitive.
I found the game quite similar to "The Company of Myself" but nevertheless this game was fabulous. The graphics reflected on the atmosphere of the game along with the music and the game ended up as a cohesive product.
The guns are definitely unbalanced, some guns from the richer players do insane amount of damage so why not make all of the guns balanced? Guns can still be different from each other but all could be balanced which would result in the most skilled player winning and not just the dude with the best gun.
The game is all fine and dandy except for the leveling system because the game makes it so hard to kill anyone that's just a few levels higher than you, especially the players with the high powered rifles that just kill you in 1 shot.