I actually stayed up until it came out to start playing it, lol. I had forgotten to write a review until now. (Fun fact, I actually played the demo back in late October and have been following you ever since.)
*SPOILERS*
I actually really enjoyed this game, and was surprised that for most of the choices with sans, there was a kiss option. (I thought it was kinda funny, actually) As I was playing, I thought the moments between the characters were so funny that I used the back button to see them again. The Flowey twist was definitely something I wasn't expecting. I liked how the game would close and just leave me in shock. I haven't played many otome/dating games, but I would definitely say that this one was one of the better ones.
Edit: I forgot to add that I did the secret Papyrus route. It made me feel awful, since I tend to be very loyal. That little handshake with sans made my heart break. Also, I was too attached to the characters to do the genocide route, and I don't think I ever will, no matter how curious I may be.