Very interesting piece of game you have here. I bought standard version and and just about to upgrade for deluxe. Couple small things.
-add button for new game plus BC's as right now it is quite weird how to get there And I still wasn't able to start it while reaching true ending and getting notification about it
-if you are planing to expand the game, then please consider adding more NSFW content.
*spoiler below*
-Maybe expand the whole second challenge to style of the third one where after initial beta scene, you will have multiple "doors" leading to similar NSFW situations, each with different partner and you can complete them in no particular order.
-allow to start new game+ as female character if it would be a possible, would just allowed reach "good" ends instead of true one, but added tons of options
-adding some Lesbian/Gay content could definitely mess with the player