I like the mechanic of moving a shield at the same time as moving the ship! I also like how you can't just infinitely use the shield. I am playing on a trackpad but I am sure this is much easier with a mouse. I would recommend perhaps using directional controls for the shield much like the ship, rather than it being based on cursor screen position. Kinda like a twin-stick shooter but right stick is shields instead of shooting.
Good work on this jam!