First of all thank you for playing my game!
Unfortunately I didn't have enough time to make a tutorial, but if you read the description you will find out the different commands for the game, with TAB you switch to the rat controls, with him if you managed to make the spectators reach the green level of attention you can steal their money by going near them and pressing E.
Also if you are not able to identify the color of the Hat you can see it in the bottom left corner of the screen!