As a concept, great! I would love to see more variety, though, perhaps enemies that split up once you shoot them or different window sizes with aiming that scales. Sound effects would also really tie the aesthetic together, like some from sfxr.
I had planned to add all of the things you mentioned and even more but I only managed to get started on the game in the last day and I just didn't have the time for it. I might continue working on it after Mini Jam.
