Meh~

It was pretty original, I'll give you that. But original doesn't always mean good. I like your concepts and environment, but it's missing a lot of pieces.
Overall the whole thing was pretty boring, not much happened. Your voice acting leaves a LOT to be desired. Yes, a better microphone would help, but the acting itself was also very stale.
There's some potential here, but I'd say it needs more of an overhaul than a sequel.

Couple issues.

If something isn't in motion, you shouldn't redraw it. It makes things look choppy. If you want this as a stylistic effect, you should prepare yourself for a TON of drawing.
Also, it looks to me like her head is getting consistently smaller through the video.

Not worth the time.

Alright, it's functional...to a point. You've got many, many errors within the way things lay out. Most of my problems with this game are aesthetic, but I'm not going to bag on your art.
However, you need some form of boundaries for the enemies. They appear everywhere. They go beyond the walls that you've set and will pop up in front of your character's arms and gun.
You've got quite a few typos and need to change your fonts.

The game is not riveting to say the least, but it's functional. Just keep at it.