Good concept, but it has very little feedback, which can impact negatively to the feel if the game. The scaling is both too fast and too slow, in that the money grows so fast that in a couple of minutes you can have so much that it no longer fits inside its box, the earnings/s and add satellite cost in particular clipping behind the box to their right. But it is also slow in that there's so little to do you feel like you finished it in five minutes, so you just wait around waiting for things to get done.
As a whole, for being your first game, and especially having been done in 6 hours, it's really good. Have you spent more time, I would've loved to see more feedback like actual satellites orbiting the planet, animations for the other planets, maybe a different one for when they are connected, a line connecting them in a web maybe. Just making the planets bigger and cutting the numbers with "k," "m," "b," and so on would be an improvement.
Again, for the time it took and being your first game it shows promise, and I really like the planet animation.