Because this was made in 48 hours some things are not very intuitive and the game isn't very long...
The main premise of the game is to do tasks for the cow before she gets too angry. You can tell how mad she is by how fast she is drumming.
To win pick up a cup on the ground or in a cubicle and bring it to the cow and drop it inside the cow. To pick up something you have be close enough and have your view centered on the object and either click or press E.
To win this you must simply talk to one of the workers. To talk go up to someone and press T.
To win this you must push over one of the water coolers. Go up to one and click.
To win this you must bring the cow a monitor similar to how you brought her the cup. The twist is that if one of the workers see you, you will drop it. If you get caught, try finding another monitor. It's hard to pick up one that is in plain view of the workers.