I really enjoy the concept, but I got to admit two things kinda ruined the experience for me =(
The first one is that the games seems to be hungry for resources, it was fine at the beginning, but as I played, it dropped to about 5FPS, making it hard to enjoy.
The second one, is that at first I played the game as intended, but then I realized it was way more efficient to become an explorer. As you earn 10 points per tile revealed, and the game seems to have an infinite (or at least very huge) playground, you can put something on a new tile to reveal 3 new tiles, earning 30 points, and keep going, sometimes placing a signal to get extra points. You will earn buildings faster than you spend them, and you can keep going on and on. I stopped at 10 000 points, and had still more than 50 houses left in my inventory. So I must admit the process became pretty repetitive, and not really fun.
That being said, if you intend to keep working on this game after the jam, I think the problem can easily be solved. One way would be to reduce points from new tiles, or give more points to the signal system. But what I'd recommend would be to set limits in the playground. You can make them look natural with mountains or forest that take up the whole tile. That way, the player would have a finite space to work with, leading to more strategy. That also would reduce the resources needed, as the game would have to handle less tiles. I would definitely enjoy that game.
Because I don't want you to think the game is a failure or anything! As I said, I really enjoy the concept. The animations when discovering tiles are also great, and add to the good pressure of hoping the tiles you will uncover will suit your plan, as well as the buildings you get. I don't want to sound harsh, I'm just trying to write a constructive criticism. Because I think you have very nice foundations, and with just a few tweaks, your game would genuinely become great! :)