Crimson Echoes was developed a very long time at the Kajar Laboratories @Chronocompendium.com they gave 2 demos out which were plaqued by bugs in the event and shop editors saving slightly corruped ROMs.
CE is not a remake but a continuation to playing a few years later and linkingthe story
to Radical Dreamers and Chrono Cross e.g.
Glenn (the Frog) is human,Chrono is in love with Marle, Dinomen are extincting because its snowing,the missing King of Zeal is building up an
evil plot,Belthasar has created Chronopolis in future(including a FF VII like battle square playing an unused boss music),it sports an improved version of the cut singing mountains using the famous OST song,
has a bright future setting,but in the middle ages the militarists from Porre
are seeking for war,while after the fall of Zeal Dalton is still here.
Ayla died but has a daughter from Kino.
You will get a new time machine later in game.
There is also a debug and a developer room hidden.
It is a really long game,that has much more content by enlarging the ROM from 4 to 6MB and asm hacks,plus new items.
New (FF like)features are minigames
and many hidden secrets and sidequests to find.
It has even 8 characters and 6 letter names.
The map and event editor "Temporal Flux"by Geiger is much better,now