Honestly more of a 3.5 than a 4, but since that's not an option I'm erring more on the higher side because the game does have a lot of effort put into it already. It has voice acting, great art, and some real effort put in, to the point that if they keep it up it'll turn out as a really great game.
The main reason I don't consider it higher though is the insistence on limiting saves. As far as I can tell, the only way to save is via a consumable item, and only at the goddess statues. This is somewhat mitigated by the fact that it autosaves, in theory, but the problem is that the autosave happens too frequently. Basically every action you do, every screen you go between, etc, all trigger an autosave.
This means if you accidentally click the wrong thing in a choice, or walk to another screen at the wrong time, you have it autosaved to the only autosave slot. Since manual saves are limited, this could mean the only way you can undo a simple mistake would be to lose quite a bit of progress. To make matters worse, if you return to the main menu after dying, the default load option is on the most recent manual save, and if you load a manual save guess what happens? It autosaves when you load in. I lost about half an hour worth of progress due to that, and it was enough to make me decide I was done playing it for now.
I know that the intent behind limiting manual saves is to force you to stick with choices more readily, but it can also be frustrating if implemented poorly. Particularly when combined with the time crunch mechanic, which makes it so a misclick can cost you a portion of your limited time.
The game does have potential, as I said, which is why I'm still giving it a good rating. It's just that sometimes you have to decide if a mechanic actually needs to be there to improve the game, or if implementing it detracts from it. I don't think the game as it stands now feels like limiting saving improves the experience, so much as adds an arbitrary limitation.