The FriendStory choices have no bearing on the outcome of the story, although characters will react slightly differently depending on what you say.
If you play through again you can find … (more)alternate endings for each chapter, but on the first playthrough there is only one ending.
The BGMs for FriendStory are:
Urban Street
School Life
FriendStory: Battlefield
Hollow Attack
During chapter 6, there's also these:
The Beast
The Beast 2
Catch Your Dreams Instrumental
Catch Your Dreams (with lyrics)
The opening animation music is just an earlier, shorter version of Catch Your Dreams. (less)
Level 61+ characters can collect Determination for the Maple Aliance through certain missions available in-game. Level 200 characters can explore the Tenebris area and actually fight the Black Mage.
that the file you're downloading hasn't been tampered with when you check the Checksum.
Checksums are used to validate file integrity during a download, not authenticity. For example, if you wish to transmit the following message:
The quick brown fox jumps over the lazy dog
And you used Unix's cksum operation, the result would be:
2382472371 44
But if the message was changed to be:
The quick brown fox jumps over the lazy doq
The checksum would be:
2539161553 44
(Values taken directly from my school's Unix server)
If the value is different, this means there was an error. Depending on the implementation of the program, the error would either be resolved or the data would be resent entirely. https://en.wikipedia.org/wiki/Checksum
Also, Maple hasn't had problems with client-side file editing for years. The primary issue currently is packet editing and injection. (less)