Here's what's new at a glance:
- Custom Colonies!
- 6 new NPCs, 3 of which are marriageable
- 12 architectural styles to unlock for your colony structures
- 14 new coat colors to unlock
- Balance tweaks (especially in regards to store pricing and item availability)
- Various bugfixes & quality-of-life improvements (especially in regards to savefile management)
The developer has said they still plan to continue updating the game and they already have some plans for content. They say more details about what's coming will be revealed in a future update.
You can see my original thoughts on the game here.