Truth be told, I had a problem delivering what I wanted to tell through the story in a clear, straightforward way. I felt like there were so many things I wanted to say to the readers, including all the minor things in my mind, it made the delivery kinda blurry. I should have put a stronger emphasis on the main message, that every little thing matter and you should make the most of every opportunity.
Also, I didn't realize the "altering the flashback" part was strange at all, but now I see it's a wild thing to happen after you pointed it out lol.
Thanks to all the feedback, I think I've found a way to fix my mistakes. Hopefully, I can make a new build and release it as soon as the voting period ends ^^