Whoooo! It's finally out!
Now with a new girl, revamped the milking system and a story! There is a lot more, but you'll have to figure that out yourself.Instructions:
You need to select a 'tool' first at the bottom-right window, giving you several options with each their own strengths and weaknesses.
After that you can grab a bottle from the right and place it below the machine.
When you filled a bottle to its max (it will have a cap on top), drag it over to the sell button and click, you should earn some cash from it. Do it more and buy upgrades so you can milk even more!
Just a small note for people who are interested; I kind of over-rushed the animations on the cowgirl, which is probably pretty clear if you reached the end. I'd be willing to give the .fla if you would like to improve it yourself. If it improves the current animations, I will replace them if you allow me to.