About bugs. I've played for the first time in this game (no previous save files) and I've got version v1.2.19-NU
Different quests can be started multiple times: after informing Rose about car got repaired Bob sends you again and again if you meet him at morning. When you see hint "Rose need her order" art teacher repeats first meeting scene AND in hint page of inventory takes one more slot. I've not tried third one but I'm sure it works so.
At the end of this game on quick tips -> all quests I have: 1) "Waiting for new Quests" (as supposed to be), 2) "Examine a particular painting around" and 3) "Talk to Rose in her room"
You need more strict checking of availability of quest starting
One more bug: Birds picture at Rose's kitchen before quest "Examine a particular painting around" crushes game(You still can rollback and ignore this picture)
P.S.: If someone stuck at point when hint says "Rose need her order" art teacher repeats first meeting scene. Wait for midday and meet him at second floor at school in art teacher's room. Works for me.
P.P.S.: Sometimes it feels like author takes game engine from "Summertime Saga" and makes his story on it. Especially when you open town map and plays background music. In my opinion this game is too linear - you have a little freedom but if you take a step aside you'll find bugs. And you don't have any optional questlines.
Thanks to you we can now fix those bugs in future versions,
1. All the bugs you mentioned will be fixed in the next update
2. The Game engine we use for the magical gene is "Ren'py" and yes you right both games are made in this engine
3. Hint tab inside inventory will be replaced with (character's status) soon
4. Music for the games are really important and if people won't like it we can remove it from the game
5. This game still in beta version, Bugs never end but we can reduce the number of it with our friends help
6. New storyline will add in new versions and we promise you will be satisfied soon this is just a matter of time
7. We try to give you the best game Please compare our game with itself and help us to get better and better
"Without requirements or design, programming is the art of adding bugs to an empty text file." - Louis Srygley
We appreciate it and give you our endless love because if you don't help us we can't create the best game for you
with all respect Xenoga'me Team