Hi pixeltroid,
I played your game
Hey! That was awesome! Thanks for giving it a shot and making a video of it.
Also thanks for spotting bugs (getting stuck in the electric obstacle and not taking damage from certain enemies). And I can now see that running out of ammo can also be a problem. So I'm adding more ammo pick ups. Oh and also, I've also created a back up melee weapon for when you run out of ammo.
I wish you had played longer. But in case you ever play the demo again, you needed to go left to talk to the scientist. He would have disabled the green forcefield that was blocking your path.
Also, since you asked if there were other weapons, the demo levels contain an assault rifle and a shotgun. You just missed it.
Thanks for your feedback and your playthrough video. It's given me a lot of insight into how a player might go about playing my game.
I hope you'll play the next version when I release it!