The Good:

•  Awesome music, it did a great job at setting the ambiance 
• Great graphics, it was easy to identify the protagonist and enemies, nice job on walking animations
•  Gives a great retro feeling when combining both graphics and music
• The difficulty was well balanced as I must have died like 10 times before I got the hang of the controls. It did get the feeling of playing one of those tough NES games when I was a kid.
•  Level was a good size and really enjoyable. Took about 10 minutes to get to the final boss and really got a kick at fighting the huge ghost.

The bad:

•  Controls are a bit un-intuitive, but well mitigated with instructions on the web page (had to go back and read to find how to shoot). Might I suggest including the instructions for controls on the home screen.
•  Shooting backwards is really challenging/quirky, as even facing back, the hero is shooting forward. You really need to walk backwards in order to shoot to the left.  
• At times the level felt disorienting especially in long corridors when there was no features to get a visual point of reference. I would suggest adding features (holes?) in the lower portion of the screen or in the background. (I totally understand we have to limit the scope/features due to time constraints during a game jam!)

Final thoughts: Although it had some minor flaws, I really enjoyed playing the game. Great game!

Note: Commented part of the "Comment Pact Club"

i like the idea of the theme though, had a little struggle in figuring out the controll to fire the ghosts, the challenge level is pretty decent, also i like the art you chose for the level, when the player is in idle state, it fires in the right direction no matter of the fact where the player is facing, i guess thats just a minor issue that can be solved, i wish you added the controlls key info at the start