Really liked the concept. And the fact that you lose life if the other ship get destroyed is a very good idea to force the player to use it as a weapon & not just as a free target.
The controls are a bit quircky. it might be a good idea to transfer the movement on a wasd to keep the mouse free to select ships easily (but that's just my opinion, you might want to bring the gameplay in a whole other direction :) )
Hope to see a more advanced version of this after the jam. I'd love to give it another go :)