Thanks for playing! I don't want to spoil the mechanic for the perfect ending CG but it has 2 main requirements, and you need to get a 'good' ending by filling the pleasure gauge once those requirements are met. There is a visual indicator on the character model once the perfect ending is achievable.
I'm looking to do an update with more UI and stuff that helps indicate when game over occurs and other things once the rating period is over. Those ideas for different targets could be fun and if I implement an actual progression system I'll keep them in mind. Stay tuned for that lewdness update! ;)
Thanks again for playing and for the review!