Thank you so much for your helpful reply, WormwoodMusic!
1.)
I raised the volume of the watermark 2.5db more,
I hope it sounds OK now.
Although I find the watermark’s last syllable a little bit quieter than the rest of it.
in the loudest part, even with louder watermark, occasionally I can hear the watermark-woman saying “AudioJun” (instead of “AudioJungle”).
I hear the same in many music that’s already on AudioJungle, so I thought maybe that is acceptable here,
the quiet and medium loud parts sounds “AudioJungle” so I thought it’s good now. Thanks for the 2nd pair of ears! 
3.)
I also created a short version of the song as you suggested,
although it got a little shorter then 2 mins (1:44),
but that was the part where I felt I have to cut the MIDIs.
4.)
Also unfortunately I couldn’t do a good string pad version,
although I tried, but I never made one before and none of my tries were good enough for my taste at least.
I might try that again in the future when I get better so I can update the song later (although first the reviewers have to approve it, I hope they will
).
I keep this “AJ not fond of single instrument tracks” tip of yours in mind, special thanks for that! I didn’t know that. (I took it with a grain of salt
)
At first I thought, as a thank you, I will write you something like “if you ever need some help with solo piano things, I am happy to help you!”, but I listened to your music and I think you have an awesome portfolio and I don’t think you need any kind of help from me
, I wish I could write stuff like yours!
So thank you for your help again!!
Good luck to You too, and have a great day! (You made mine!)