Game glitched out at the end and the waves kept ending the instant I clicked an upgrade leading to a very high score but making the game unplayable at that point.
Overall pretty fun but simple shooter. I enjoyed it, but it could definitely use some balancing. The juggernaut felt like it was way too slow to avoid damage forcing you to tank all the enemies which did very little damage.
Good job on the game development, bad job on the ai generated cover art.