I'll describe the game mechanic down below and how to do it, I hope it will help, but also hope others will figure it out by themselves.
In first level you can interact with 4 things: door(open/close), puprle guys(kick them with LMB or not), PC(to make money) and phone(to raise people support). All with LMB(or screen tap).
To fill "people support" you need to click on the phone from time to time, for each click comes 10%, ie on the first level, you need to click 10 times (if you do not kick people, cause people dont like it).
To hire purple men, you need them to reach the black aisle, and also you have at least 10$ in "Money". You need 10 of them, and click on PC gives you 1$, so you need 1 X 10 X 10 = 100 clicks for this scale. This means that in total 100+10=110 clicks are required for the first level. You cannot lose here.
In second level appears 4 new things: electicity disable(you cant make money from PC or make a phone call), phone disable(cant make a phone call), swap hired man back to $(little yellow "-" button) and policemans.
Electricity and phone disables from time to time, to buyout one of this you need 10$. Phone is not a problem, however if electricity disabled and you dont have 10$ or hired man to kick out - you lose.
Policemans want to see you in custody, so if they reach you - you lose. Unlike purple men, they can stand for 3 hits and break doors with time.
So complete things like in level 1 and watch out for new.
In third level 3 things: new stronger policemans and fake employees (dont let them pass) and new door to hold. Complete mechanics from all levels together and congrats.
P.S. Sorry for my English, its not my native lang)