I just finished the game and I'm really grateful for this great game .. it grabbed my attention really well since I first downloaded it about 10 days ago
I usually prefer games that I can get all the hot content in one playthrough, but seeing how you handled the neighbor choice ( that the one we didn't chose still will be included in the "Harem" later) and also the strong hints about the other sister might be added later is a really good move
Also the gallery (and its unlocker) are helpful
Now the daily mini games were mostly nice, the one to link days with their events usually took me a few tries to get days far enough from each other to easily solve them.
However the "?" code one I believe I missed most of them (not sure how many there are), I got Paige Fantasy #4 & #5 from the escape puzzle and #6 from
Paige PIN code 6969 ..(the completionist in me is annoyed a bit about it)
Umiko picture hunt, well the hidden pictures were so small kinda painful for the eyes to find them (I did find them all)
As an achievements hunter in video games I do enjoy side quests, so I appreciate the minigames .. however considering those VN games need a "specific mood" I think the minigames shouldn't be too demanding so that they don't distract too much.
It's just my opinion though, there is really no need to go spreading it around