I'll be honest, When it comes to Adult visual novels I hate Sandbox, if the sandbox elements are like "Desert Stalker" I can handle it as the whole game plays like a normal linear AVN with optional choices but the only real Sandbox element that "Desert Stalker" has is the game is basically using the house as the main base or head quarters or central area.
You click a room to interact with that girl, if you click the map you see a city and 2 other locations, if there is a question or story in any location there is a explanation mark ‼ and id you click on that location with the mark it plays the whole quest like a story AVN.
It's set up in a way the entire game plays like an AVN and the main purpose of the sandbox elements is just to add repeatable events in the home.
So it's goes like this, Wake up, pick a location with a marker>>>plays like an AVN or
Click the living room area and play the repeatable events.
I really hate sandbox otherwise, I really don't want to click/tap my screen so many times or find clues or object or collect stuff... I really hate the exploration shit in sandbox games.
I'm playing these because I wanna beat my meat to something more creative and interesting plot wise then regular porn, I'm playing with 1 hand, the las thing I want to do is collect items, click 20+ times to collect or find a clue, met some whore/Love interest at a specific time of day to activate an event... I don't like guess work or more steps and effort to read the story and watch the sex scenes...
I like how the regular non sandbox style just spoon feeds me content and offers options like cum in this or that hole, piss on her or not, stuff like that.
Please please don't go the sandbox route mate or if you do please at the very least do it like how Desert Stalker does it, play that game too if you don't know what I mean because sandbox games are shit and only really feel right in a live action game where you can actually play with a controller or something... Feels retarded playing a sandbox game with still images and I think RPGM maker would make a better sandbox engine id you wanted sandbox because you got a little pixilated character running around like braindead mario but I don't play RPGM games either since again I hate sandbox or having to jump through hoops and go through extra steps just to get the story and sex scenes.
Side note: mrs.stones looked hooter with the slightly more tanned skin and somewhat brownish hair she had in the first few updates before she got pale like a crack whore I swear her face has changed and her hair is darker too