You misunderstood. It just refers to the presentation of the story & the story itself remains the same with nothing changing.
This in fact is already a pretty linear story, as every few event in a girls route directs you to complete another girls route, basically forcing you to play the story in a fixed sequence to make the story you want to show.
Even though the girls have strong character arcs, they are all connected & you are basically forced to play the events in a fixed sequence (eg: you cannot proceed on a girls (A) path until you complete another girls (B) path & cannot proceed on that girls (B) path until you complete yet another girls (C) path - so the story sequence becomes C->B->A)
In contrast you can compare other sandbox games where the romance of girls 1 to 10 don't affect each other & you can freely choose to romance whoever you want in any sequence.
So instead of giving the player the option to move forward in a fixed sequence of events only (progress on girl A's path before any other girls event triggers & then the same thing for Girl B's path), you can just present the events in sequence (Girl A -> Girl B -> other girls), saving you the coding of event triggers.
You just put the events in sequence directly instead of putting event triggers that make the player play the events in that sequence anyway.
If you have to trigger Riley events before Valentina event is unlocked, which in turn is needed to unlock Harper events; you can instead just use the jump command so the Riley->Valentina->Harper event plays in sequence in a VN.
Basically instead of writting 'Complete Riley events' on Valentina's hint page, you just arrange the Riley & Valentina event in sequence as intended in both cases.
The 4 girls path in this novel is too intertwined with each other & the main plot to get any benefit from the sandbox presentation as they need to be completed in a certain sequence to make sense, which is achieved by the game often blocking one or more girls paths & forcing you to play a certain girls path. Since this is the case, just arranging the events in that sequence as a VN would feel better imo.
This is like a CYOA book, but there's only a few options. So it's like a normal book but you still have to follow instructions to turn to specific pages instead of having the pages in sequence conveniently.
Again, a misunderstanding. Revamping/Remaking the game at this stage would be very inefficient & not what I would/was suggesting. I was only giving feedback how the game would be better without the sandbox as a VN given how the character arcs & main plot are intertwined with each other, restricting the sandbox style implementation of the quests.
"More than that, it is antithetical to how the game is written."
Maybe, but sandbox is antithetical to how the game is presented.
The storylines of the girls affect each other (eg: Riley & Chrys interacting about the MC at the beginning of the story) & it's pretty evident the events are meant to take place in a certain order. This feels incompatible/annoying with a sandbox whose main theme is that freedom of which order you complete quests in, & fits more with a sequential VN.
"The sandbox gives me the flexibility I need to make that kind of storytelling"
Maybe that's comfortable for you, no judgement on that. But do understand the game as it currently is, is not flexible. You cannot complete a girls quest line & ignore another girls quest line, as is possible in most sandbox games. While most sandbox games have few characters who are intertwined like this, here all 4 are connected together like that, including even the main plot line.
So rather than a flexible sandbox beach, or a VN's straight road with few branches, the game currently is a tresure hunt in a meadow: You are directed to go from point A to point B then to point C, creating a twisting road thst's jerky to travel on.
Which is more restrictive than the 'move on any direction' beach & more tedious than a straight road.
I wholeheartedly agree. This is also why I said what I said. It's about what format would convey these storylines the best, a jerky sandbox with low freedom or a smooth VN presenting the story in sequence.
If Riley, Chrys, Valentina & Harper's storylines were isolated: i.e. you could complete 50% of either of the storylines without affecting the other 3, it'd be fine as a sandbox. That's the main point of a sandbox, so ppl can choose which storylines/quests to complete & in which order: they can complete a girls full story 1st, or they can do 1st quest for each girl & then the 2nd quest or just the girl they liked.
However here the 4 storylines are intertwined: what you do with Harper affects Chyrs & what you do with Chrs is commented on by Valentina & Riley. This imo is the charm of the VN & also the reason why it feels so great compared to standard isolated sandbox questlines.
But this also means the events need to be played in a specific sequence.
This is achieved by the game directing you to spend time with Harper on Chrys+Riley+Valentina's hint page.
Instead, wouldn't it be easier to just code the Harper event, then the Chrys event & so on?
Rather than say the sandbox is badly done, it's more like the story would flow more naturally as a VN since the sequence of events is more predetermined rather than being 4 isolated storylines you'd find in most sandbox games.
However after 3 years, as a single person development team, I wouldn't suggest overhauling it rn.
Just keep it in mind for the future: It's better to go VN if you have a specific sequence of events between different girls (Do harper->Chrys reacts-> other events build on chyrs events)
Sandbox is better if each girl's quests are mostly self contained storylines with little overlap allowing the player to proceed with freedom, with little restriction on how/in what order to play the events.
This is more a theoritical rather than a suggestion to implement change in the current game. That's all.
This is my opinion/feedback anyway.
While VN would be better, the sandbox is fine.
Good Luck going forward.
PS: This was about this game specifically. I have nothing against sandboxes & don't mind playing sandbox games.