Great game, it plays really well!
One thing I think might be useful to add here is a better damage indicator - a couple of times I missed that one of my systems got damaged and thus lost the game. It could use either some sort of icon showing that the system is requiring repairs, or perhaps a trail of smoke coming out of the machine.
Other than that, it's a pretty good entry! The game is easily understandable without the need for tutorials, and it's fun to play. Good work!