Hello, I played your game on stream yesterday. When starting the game, it looked like a PowerPoint presentation.
For a Visual novel, I think it lacks some music, the background could be better, and some animation for the character would be nice or maybe just change the pose if you want to stick with png image.
At some point the game kinda stops working, so maybe check that out.
For a visual novel, visuals are very important, so I suggest giving the player something more to see. If you can make it similar to a webtoon, that'd be cool.
I also think you can shorten the dialogue a bit, it's very descriptive, as if you're just writing a book. Adding appropriate images, can help describe the scene better, so you don't have to write as much.
Here's the clip of me playing your game: https://www.twitch.tv/videos/2521115816