Thank you so much! It is a cute little project isn't it? :3
I plan to have 5 levels for the game's initial production release. So it's about halfway done now, a little under half if you consider the final 2 levels will have more content than the first 3, so they'll likely take a bit longer to complete.
I'm so glad you like this new little game of mine, and thanks for the bug reports as well, I'll check into those asap.
I like the breedable pregnant cow idea, I'll keep it in mind. Might be a cool thing to add to an improved version of her that could be unlocked in a later level.