This game Is WAY TOO ABSURDLY DIFFICULT if your new, You don't even get to keep the money you make if you end up losing, and with the Starter Pistol it's impossible to kill anything effectively when Its such a stupidly large group. Even in Casual Difficulty it's not any better.
You need to Tone down the difficulty Drastically cause No one new is going to have fun with this game if you can't even beat the first level. Especially when eventually it becomes impossible to break free
EDIT: I retract my previous statements, Aparently my game was just bugged to where every time I shot I would reload