This is a very nice looking demo!
I believe the gameplay would profit from mouse controlled free aiming (but I realize this may not be wanted for the sake of "oldschoolness")and the ability to shoot while you're running.
Once you add a couple of different enemies and variation in environment graphics, this could become a real crowd pleaser.
So keep up the good work, I'm looking forward to future versions!
all of this.
Overall it felt way too repetitive, every level was essentially the same. Either make it a lot more varied or a lot shorter.
I think the 'button' thing that your meant to destroy should have a different appearance from the red beam door thing, they look the same but they behave differently.
I think the combat felt a bit stale, being able to move and shoot would be awesome + that mouse thing that was mentioned.
When I got to the boss it felt like I was doing no damage at all to him, I didn't even know if it was possible to kill him.
Its generally solid game in most other areas, I thought the graphics were great! just more variety would be incredible.