Still a lot to do 
For me, it wasn't quite clear why I couldn't build on an "arid" tile until i researched the respective technology (at least that's what I think "unlocked" it).
The "things to do or end turn" button works quite well. However, when visiting a colony that way, it would be nice to have a rough indication where the colony is on the star map - right on the colony screen (maybe a small star map as mouseover for the colony name?)
