Was ok, too short
I did enjoy the game although it was too short, often you were attacked because you were waiting forever for an attack ship to be built, and if this happened to anyone else, when you run out of moon fuel or what ever, and you try moving to another moon, such as a previously used by the enemy moon. It takes like an hour for your ship to get there!
The survival mode was also far from flawless, you receive far to little to keep up with the attacks, the repairs cost money and ships cost alot of money. So heres an example: You have 100 $, cash 60 on a simple attack ship, but your mother ship was damaged in the first wave, spend 20 on a repair bot, then the 20 dollars you have left isnt even enough to fully repair the ship!
Overall it was fun even through the flaws, a little too short and redundant. Try adding more ships, a better way of money use and retrieval, more use of the upgrades (i only used one for the whole game) and make the building time less.
4-10 for a good try