The Bar

You are bartender on some disco and you have to server drinks to the people in your bar.

                       

Take empty glasses from the shelves. Drag them with YOUR MOUSE to the apropriate tray to fill it with the drink. Then drag the drink in front of the customer. If he accepts it, you'll receive time bonus.
Use ypur mouse

Then press Play to enter the frontline. From there, you can click on the units it the toolbar to deploy them into battle. Plan your strategies carefully, and dont forget about the upgrades.