You did a great job exploring your mechanic in such a dense demo. I liked fighting the eyes, especially! I did sometimes wish there was gamepad support of some kind because I found it difficult to track my character and aiming reticle simultaneously while a lot of bullets were on screen. That being said, I wouldn't be sure how to resolve that issue since the precision of mouse control seems kind of necessary!
Overall I think your team did an awesome job with the design, character art and writing. I had a great time and wish you luck developing the game further!