I see that the inquiry is half a year old, but I have recently discovered this game and as of today, have managed to take places 40, 35 and 32 on the leaderboard.
If interested, I can provide feedback, although I have only played the demo, without unlocking any bonuses or weapons, and am not really interested in trying out those options. Rather, I am interested in pure gameplay and balance.
There are plenty of bugs and other issues to talk about even disregarding the different gameplay options.