Combining a tower defense game with resource mining is such a cool idea and I believe it has a lot of potential. Right now though, I feel a little overwhelmed by the game. I think a thing that could really help you make strategic decisions would be to inform the player about how much damage a trap does and how durable it is. Right now, I just slap down random stuff, hoping it will work, and it just doesn't. Also, having to click so many times in order to mine a tile feels more tedious than fun.
Still, this is a pretty neat entry considering the time constraint of the jam! I think if you continue working on this after the jam, this might turn into a really cool game.