Awesome game! The mechanics are really simple but also really fun! The graphics and audio are also quite polished.
Feedback:
* My performance was best when focusing on just one link at a time. Accordingly, when more links were added to the waiting list, I found it easier to pull them from the BOTTOM of the list rather than from the top, since the ones at the bottom would have more time left. This was problematic though, because the associated transmitter might not be "ready" to transmit that particular link yet (because a different link is currently "active" on that transmitter).
* I'm surprised that you chose to randomize the rotation speeds of the planets at the start of each game. I suppose it adds replay value, but it also makes it more difficult to transfer skill from one playthrough to the next. It also needlessly adds an element of chance to the game.
* Based on the description, I initially thought that the Joint Limits upgrade would decrease the size of the "walls" on either side of the transmitters. It confused me initially that the upgrade could allow your transmitters to shoot "through" these walls.
* I never figured out what a Mirror Satellite does. I tried buying a Transmitter Satellite once, but I didn't find it very helpful for some reason. I was able to reach $1000 without using any satellites.
* I have mixed feelings about the Transmitter Power upgrade. Personally, my aim is best when I'm fully accustomed to the speed of the projectile, but since the Transmitter Power upgrade changes the speed, it becomes harder to aim after buying it. Furthermore, it becomes harder to re-play your game because restarting the game will bring the transmission speed back down to the slowest setting again, which again screws up my aim.
* I have some suggestions for making the aiming interface a little nicer, but I probably can't describe them succinctly here.
Other feedback:
* Clicking a transmitter to select it sometimes doesn't work.
* Shooting toward a transmitter that is "too close" will result in a missed transmission.
* It's difficult to distinguish the yellow from orange, and also the two shades of purple.
That said, your game is my favorite so far from this Ludum Dare! Awesome work!
-- Tommy