It was taken down due to a debate of letting erotic games be open and playable. Since bank companies like VISA, PayPal etc have bigger power over some big website such as this one, they taken down some game that have 'erotic tags' as well as this one. It started around August and may have noticed some changes or absence of popular ones not there.
That's my knowledge of what I remember, you may have to look it up specifically if you want more information on what happen months ago.