I'm replaying the demo piece by piece right now to refresh my memory. Some of this will be random as it comes to mind though, just take it as notes etc... not really in order, sorry
As stated, I believe the opening should be slightly edited. The flying seagulls is nice, but if possible the event calling the ballons at the Square should be removed since they don't fit.
Also, personally, I think it would be cool to use the Marle + Crono wake up dream from Chrono Trigger in the opening... I can't remember the exact dialogue though, so maybe it wouldn't work here? Marle's opening speach just doesn't flow right. "Get in your tux and c'mon!"... just doesn't click with me for some reason.
The NPC's in Truce are perfect. As mentioned also, there's some errors in the Mayor's Manor. Also, the NPC in the Residence next to Crono's house should realize that he is Crono, so the comment she makes on the couple him and Nadia/Marle make should be slightly edited.
Some of the speech, as said before, by NPC's just seems too elaborated upon. If possible, it should be shortened or dumbed down. "Dear, son" etc don't fit the context of Crono's mother. "See me when you're ready to go to Guardia Castle"?
In the Vanguard Post, some of the tiles are incorrectly placed, especially the wooden floor. Might want to look into that? When talking to the Vanguard man at the desk, you should have it so Crono can't move, since you have to press up/down to make a choice.
The music in the Cathedral/Fiona's Shrine sucks, honestly. It hurts my ears.
After picking up the power tab in the Porre Mayor's Manor, the music changes to the other overworld music instead of the eerie music that was playing before.
"Rigidified" (Melchior) - Is that even a word? O_o Melchior's character seems to have matured quick and uses bigger words now... Not really his style.
Also, does the scene of Lucca + Crono running to the castle need to be shown? Just seems like a waste of time. Not to mention, they're running from the right where the gate is towards the castle instead of from the left where the entrance is
The meeting with the Porre representatives should take place directly in the throne room instead of the dining room (also, one of them is standing in the wall when they come down the stairs). The dining room seems too large of a place to have 6 characters discussing. You should have the King seated at the throne with Marle in the opposite chair, and then Crono at her side and Lucca at the Kings side. The 2 representatives should stand on the carpet in front to initiate the negotiations.
The whole part where they jump/escape and they form a gate and go to the future... just meh. That whole scene needs to be reworked. "OH GNOES! IT HIT MY POCKET IT'S DESTABILIZING!11!" Everything was going good up until the Porre meeting, in my opinion. "Test protoype"? How about just "prototype". Why would Lucca just be carrying a protoype with her anyways? She should know that it's way to unstable to just be carrying around in a pocket, and possibly expecting a battle by attending the negotiations anyways.
I also don't understand why they would just jump into a random gate... it seemed way too rushed. They're at the foot of the mountain anyways, just retreat.
Glenn's accent is way overdone, but I think you already said that would be fixed?
Oh, that reminds me, there's a few places where the first line of text is indented, those should be removed.
The animations for the dino's w/ Ayla and Kino is a bit jerky, it's like their normal back pose but switching to a front every few milliseconds.
Magus' text should be tweaked a bit to be shorter, he's out of character like mentioned by speaking so long with unneeded additions "Hmph, howl all you wish." It should just say is it a shattered dream I search for? Death... is... nothing... to... the... reaper! etc
I'm also not a fan of the choice of character portraits.
Anyways, that was just a quick run through of what I think should be changed or what have you.