This game is pretty awesome, for only being a demo. It looked, sounded and felt like something I would have played as a kid in the early 90s on the old IBM DOS PC.
The pixel art is all very nice, I especially like the little diver dude. The moving and shooting both felt very good and responsive.
I would have liked to have seen some powerups or upgrades or additional weapons, as some of the later areas filled with protected blaster enemies were a little difficult to get through, so a shield or health upgrade could have been nice to have.
I did make it all the way to the end and grab the black and white orb, so it wasn't impossibly difficult.
Awesome game, dude. Also respect the totally righteous guitar licks as I played this most excellent adventure.