Great game! Visuals are awesome, the sound is good and adequate, the movement feels nice and gives you the feeling of being in outer space.
What I could add is a little more feedback when you recieve damage, also when you hit an enemy. Maybe shooting through walls feel a little weird and you definetly need a quit menu.
But otherwise it's impressive how you make a game this detailed in only 7 days, keep up the good work dude!