Wow. That was a little faster than I expected, I thought that the Act 2 climax might have needed a little more time before the Act 3 plunge.
Of course, some fans don't want to ever leave Act 3, which is why the Monika After Story mod exists. Now you can have an English-speaking desktop virtual waifu to chat with! (Product not exactly as shown.)
Update
Currently on play 2. Gonna try for all the bad endings I can before I try for the friend one.
For the worst possible ending, delete Monika before starting a new game. For the full effect wait 10 minutes after the game gets bricked.