I hope someone else can properly test your game (I don't have any idea what effects could I have missed since I had to open the game in the opengl3 mode and the console was giving me many graphics errors for it) since I have an old graphics card, but anyways.
I really enjoyed the art, it is really well done and it is nice to see more painterly games, plus you nailed the style since in most cases or the visuals are so stylized that it's difficult to figure out what you are looking at, or it looks too realistic so you barely notice any difference (and I know this is more applicable in a 3d context, but I think it can happen in 2d too).
Also cannot properly comment on the gameplay since I'm not a big fan of visual novels except when they have an extremely interesting and vast lore for me, I think a true fan of visual novels could give a better review than me in that.