Sounds good, in past I played a lot a game called Sentinels of Ceth (which was itself an improved "rip-off" of an ancient game Rip-Off).
But there gems you defend decreased in amount (they were gracefully stolen by drones). With increasing amount of things to defend the game might get easier the further you play (though maybe I'm imagining the idea wrong).
Anyway, I suggest you to get some rest now, you submitted something, and that's a success! :D