Not quite sure about the gun upgrades, but I do believe I read in the tutorial (though I could have misread) that you do unlock the goggle upgrades automatically when you reach certain levels. So for those who wish not to spend the extra couple of bucks you will get the upgrades eventually.
How is the personal space game. Is it worth the money to play, or is it good just for helping leveling up?
Wow - wish I read that tutorial before I bought the googles then.
Eh - I'm getting hella experience so I can't complain too much (just made it to level 10 today).
Known Aurora level prizes are:
Level 5 - unlocks Aurora gate (apt item)
Level 10 - unlocks nDreams logo tshirt