Here are the new things in DV3:

Added: 

1. New 7 GEMS
2. Readded the main crew!
3. New rooms!
4. a big room filled with supplies 
5. Readded the 3 slots
6. New Sounds (very loud)
7. LS4tLSAtLS0gLi4tIC8gLS4tLiAuLSAtLiAtIC8gLS4uIC0tLSAvIC0gLi4uLiAuLiAuLi4gLyAuLi0uIC0tLSAuLS4gLiAuLi4tIC4gLi0u ADDED TGMBOB-02

Changed:

1. New designs of the characters
2. Improved Item Management 
3. New Logo!