A humble game but a good start for sure!
The control is very responsive with the mouse and I like how the health bar animates when taking damage.
Some ways to expand on this idea: Maybe making it so the collected materials change your gameplay, altering your way of firing (more shots, more damage, maybe even altering the shoots to cover a cove instead of just in front), maybe healing you.
Also consider adding some moving enemies on the future to make it more challenging.
Keep it up!