It's a start.
Things you might want to improve on:
- Graphics, take a tutorial for drawing in perspective and learn a bit about shading. That will make it look a whole lot sweeter. Also, just giving your text-boxes an other colour, rounding those corners and making them slightly transparent will make them a lot nicer. Just try some stuff out. ^^
- Logic, I heard a huge explosion and suddenly there was a keycard upstairs. Did I miss something? o.O
- More length, more rooms. It would have been neat if the explosion I just mentioned would have blown a hole in one of the walls. That would solve the logic problem as well.
For the rest it seems quite okay. There seems to be a good start for a continued story, so use the oppurtunities and reveal some interesting facts along the game(s).
Lastly, the sound... was... Awesome.
I loved the ingame music, for real. If anyone could tell me what the name of that song is, please do so. :D