there is no money system because i want all the players to have equal weapons.
Okay, balanced weapons are critical to a good build, but something which I do not agree with is the fact that the game has no progression.
I have realised that in game production, progression goals are a necessity to keeping players entertained.
I suggest you find some way of players to spend their points (whether its extra starting ammo, or a pointless silly hat) to make the game more interesting.
Of course, this is just my opinion and is only relevant to a certain type of players (I've found that older players are more away of their own progression while playing, while the younger players don't mind about repetitive killing)
In conclusion, I think you should make an aspect of the game progressive to keep players interested and keep the game fresh.