This is a turret shooting sequence, something featured in many RPG games of old. Shoot a side panel off and then shoot the turret through the side.
Good ol' fashioned elbow grease for the art style. We can always appreciate that kind of effort. Lack of sound does undercut the experience a little bit.
I didn't fully understand how it all worked first time, but I got through just fine on the second.
A healthy entry for a newcomer. As you continue to jam, your ambitions will raise, and you will become stronger for it.