So, I planned to add more content for this build and push it next week, but I found (and fixed!) a nasty bug that was causing random crashes. So, out it goes! 

There's still a bunch of new stuff:

A new weapon technology, Gravitons! and trade balancing.

And biggest of all, new missions and planet surveys. Planet surveys can be completed on unclaimed habitable planets, which will discover new lifeforms and notable geographic landmarks and can result in boosting your empire.

I've also added a "Clear" button on the main screen that will clear the galaxy and saves (which would be a good idea for this build to get all the new additions).

One last thing, among other optimizations, I've added an option in the settings file to change the size of generated terrian to increase performance on older machines, "terrainQualityReductionFactor".