Honestly, I'd create a creative asset heavy game like honey select with a large selection of everyday items and environment with modding as a main focus, an ultimate sandbox for other Indie Devs to make games/VNs
Edit: I would also make sure there is enough documentation for the controls and for how everything works, and extra info for modders.
Plus it would in turn make more games, so more things to play.
Yes modding and its accessibility ensure renewal and longevity for a game, it's important. It's actually a major part of what makes video games go forward, much more than the industry in itself
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Ok so another idea here; something more general that could be applied to many ideas above
real time gameplay integrated in sex scene
-Take pretty much any h game you like with hot scenes (animated). Wouldn't you like more interactivity, something that makes you come back to said game months, even years after (also thanks to modding community lol)
I will take an example where you are a male protagonist, but the opposite could also be very interesting.
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First of all the context: there is an intimate scene, including the teasing/skinship/ undressing part at first, then leading to actual sex
The whole thing aims for something relatively realistic: both the girl and player (you) have
_Stamina [physical muscle capacity to move, strength..]
_Teasing/ arousal [the more teasing, the fastest arousal grows. Also, at high arousal, it gives you various buffs on your stamina: faster regen, slower consumption rate..]
_Lust/ "cum count" [you can cum a limited amount of times as a male protagonist, let's say 2 - 3 times max. Every time you cum, you are less hard, so your actions have less impact on the girl's arousal, + various debuffs on your stamina for a time - Going from buffed state to debuffed one should have a consequent impact on your game feel]
So everytime you cum it is harder to make the girl come, and it gets increasingly harder to make her come the more she came before
You can edge both you and the girl, which leads to stronger orgasms, and so stronger temporary drawbacks
Now the fun part is that the longer you edge the girl, the more bold she will get to take actions on her own, so she might bring herself or you over the edge
Of course all these are linked to your stats (and the girl's stats too), and various contextual buffs and debuffs ([drunk], [horny af], [in love], etc..).
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Now for the controls part! (PC, keyboard)
[WASD] + potentially keys accessible with left hand ([Shift], [Space], [E], [F]...) = undressing, teasing, and changing position (switch from missionary to side, lift her..) (possibility to remap and add shortcuts to convenient keys)
[LMB] [RMB] [Scroll wheel] + other buttons your mouse might have = direct actions such as thrusting, teasing, and grabbing
The most important thing here is that most direct actions should be done by clicking, not by mouse dragging, because most of the time it's janky.
You click = you thrust, you click faster = you thrust faster. holding [RMB] allows you to grab her / pin her down so you can bang her with more ease, but takes stamina
and you can go auto mode by holding [LMB] + scrolling mouse wheel up or down
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Here it is for the general idea, it would make sex scenes much more engaging and fun imo, ofc there's room for adaptation, but having a rich and deep gameplay is something is always found was lacking in h games
I'm pretty sure if a dev was to pull it off consistently, many others would follow and honestly it would be for the best
I want this in a mmorpg lol