Here is some advice I got for the developer of this if they want to make it successful.
1) Keep very little "grind" elements. Currently spying lands you like 1/8 of a % in sneak skill. Or if someone is to max sneak skill that would take 800 spying events. That is way too much grind, and that's not like it will be the only stat you want to raise either... If you want to keep a small amount of grind people may find that fun. In fact allow the players to decide in-game just how much grind they want. 1 option to keep the current grind, a 2nd option to change the grind to about 1/10 of it's current form and a 3rd option simply to remove such grind altogether. People hate grind.
2) Do everything you can possibly do to avoid it from becoming an "empty sandbox". Simple interactions are a great filler. If someone is in the room you should never have 0 possible interactions with them. Avoid that like the plague. You should be able to talk and raise or lower relationships. Make a girl more domme / sub. Slap an ass, give a wedgie, pull pranks... Be a dick in general... Also, nice things too. Clean the house for Ann ect, not just the same old pool and dishes shit.
3) Add more "random element". Women do not wear the same clothes every day now do they? Girls should have several outfit possibilities for each state they are in that can come in randomly. Not unlike how it is done in "Superpowered", but even deeper than that. If your domination level gets high enough over a girl you can suggest she wear this or that instead as well.
4) Don't keep it in the house. Ann goes to work. You should also be able to go to her work. Meet people at her work. Help her at work, maybe get hired there yourself. Lisa has school that's another place you should be able to go and meet folks.
5) Don't abandon the game. Keep working at it. Rework it for Patreon as well to be complient so it requires an incest patch.
6) Update regularly
Unfortunately the game up to the point I played is identical to the original one...
A lot of free time really wasted by the mc ..
More ideas that could be tried..
Computer use early in the game .. (as a distraction)
Mc could go to school..Study or not... (more.... interaction..... between him and sister outside the home)
Best interaction between the scenery .. ( like watch tv during the day)
The game does not have the option in main menu (NTR ON/OFF)
Help with meal preparation..
Animations (even simple)
Avoid a total revamp with each update, losing saves ..
Etc..
When the game was created there were major software limitations, and few games as a reference.(not the case now)
The catch phrase is big brother another story, but the way it goes is:
Big-Brother-Same-Story ..a different dev
Dev has ideas for modifying the game in the next updates, but as a differential to draw attention as something new, some should have already been implemented.(Probably would have prevented a long flood of memes
)
The fact that BB is so much copied in my opinion ..
One of the most old and popular games ,the structure of the game is simple, the rights and all material on the game was released for the original Dev ..
Besides the vast majority of bugs have been Fix..by several devs ..