Confirmed upcoming features

Online coop
Developers Have confirmed the addition of Online Co-Op, although details of it are unknown. a estimated time frame is 2-3 months

Ice Tileset
A dev nearly confirmed a future ice tileset

according to them, it will come In time for Christmas.

Survival Campaign
"The next campaign we're creating, which will come free to all owners of the game, is going to be centered around survival."

Improved tooltips
Developers have confirmed that they are currently working on improving tooltips.

Improved tutorialization
Improved tutorials have been confirmed to be upcoming

Search tip database to become generic compendium/help system, as well as new additions
It is currently being worked on.