Sorry for the late reply but I was thinking of having some sort of gameplay like Milfy City so you can wander around the house and do quest
I personally enjoy a good sandbox game, but there's got to be enough "going on", with many roughly-equal-length parallel paths in the story. If by "sandbox" you mean "here are 30 locations, if you click on the right one something will happen to move the story forward, and if you don't nothing will happen and you'll have to click on another location and hope for the best", then no. There's no strategy, no thinking, just luck and aimless clicking until something happens. It gets boring after a while. But straight-on visual novels can get boring pretty quickly too, particularly if the story isn't amazing.
The best sandbox games are not visual novels, but contain many different stories, that don't need to be completed in a given order. They player can play them in the order they prefer (and ideally, play them all in one playthrough, without have to replay to entire game just to gain access to one or two new scenes). And, the game must have a good, built-in hint system, giving the player some indication of what they're expected to do next. As a game developer, you know exactly what the player should do next, but as a player, that is sometimes not clear at all. Ideally, the hint system should be two-leveled, with a basic hint of something like "I should go spy on the neighbor", with a more-detailed hint of something like "Raise stat X higher than Y, and then visit the neighbor's back yard at 21:00 on a Tuesday", just in case the basic hint isn't enough for the player. Remember that there are a lot of good games out there, and if a player is unable to make any progress, they aren't necessarily going to ask anyone for help, they'll just play something else. Games should be fun, and far too many games stop being fun after spending 5 hours and making absolutely no progress, and having no idea what you're doing wrong. People want to hear your story, but everyone has a different level of patience.
If you're still looking for a programmer, I suggest you check out my
Family Life Ren'Py Remake. Don't bother downloading the extra event packs, just the base game. In particular, check out the "thread board" in the game, and the other options available in the cheat menu. Note that this doesn't have the basic-level hint system, just the detailed one, since this was just a remake of an existing game and I didn't have the time to write thousands of basic hints all at once. But by turning off and on the location highlighting, the player can play the game either as a sandbox game or a visual novel, depending on their preferences (and they can change their preferences whenever they want). If this style of UI is something you're looking for, I can help set this up for MBF. Once the framework is set up, it's pretty easy to add new content (easy in terms of programming, still nearly impossible in terms of rendering and coming up with a story).
