I found the puzzles very amusing so I was engaged with it from the beginning. The tutorial was a great point that made the game-play even more engaging.
Just to be a bit constructive: The levels were a bit long to be replayed completely, perhaps shorter challenges at the beginning to learn the dynamics could have improved the engagement. Also I would have appreciated that the camera partially follows the mouse so you can visualize better the challenges on the bottom with the UI there it was hard for me to see gunners and other things there.
Anyway you have my score. Great job!