obviously theres not really that much here, but what is there is very good. i think the shooting and movement is smooth and the sound design is decent, and i like the pixel art you've made, and would like to have seen what the scrapped/wip assets looked like.
i think you've stuck a decent balance for reloading for ammo conservation, in a final release i would love to see ammo you can pick up rather than it just infinitely refilling, as this would promote techy movement and flying around the enemies to get ammo as a reward rather than just waiting for it to fill back up again.
good job on submitting something, and i think this could be great if finished