Thank you for your interest in our game! Yes, this was made for GGJ18.
As for development we have a few ideas in mind in order to add some replay value and humor, but nothing has been decided yet.
We are Turkish in fact, so are the messages :) Messages are a mix of generic ones we came up with such as "Let's have sex", "Wow, aren't you beautiful" etc. and allegedly real ones shared with us by girls at the jam site like "What's your shoe size".
As for artwork, Starducks Coffee background is a rendered image produced in 3DS Max. Rest is 2D. We wanted to emphasize the girl and other elements that way. Unfortunately we didn't have enough time to animate the girl and make her react to events in game.
Thanks again.