I loved the atmosphere. The music doesn't hurt either, it's quite well chosen, the BGM and the ending music alike. I appreciated the choice of putting another rose at the rightmost ending path which forces you to do the path all over again, if you choose to get it to get the alternative ending. It's sorta like the author is saying "okay, I give you a second chance, but you're gonna need to pay for it, OR you could choose the easy way out. Just sayin'."
The story behind it is good, simple. I loved it. I appreciated most the alternative ending and the message you gave with the two of them considered together. All in all, a good game. Even if it takes some playthroughs to get the alternative ending, the ability to choose different paths prevents it from boring you, if not a little. I especially liked how things have allegorical meanings ("you lost yourself - it was too much to bear", even some paths "This jump is long. Maybe too long for most.", implying you have to either trust yourself to be able to do difficult things or choose a different path.)
Rant over. Good Job.