Runs fine here on Win7, 4gb ram, dualcore 2,5GHz, Geforce 525M laptop.
Pretty cool
Had a bunch of scares while playing :o
A few things, though. With the few bullets I have in a magazine, I get pretty upset every time a shot goes straight through a ghost without damaging it. It seems I have to shoot a bit to the left of them to hit them, but then when I try to compensate for that, it changes when I move around. Almost like it depends on which angle (map-wise) I’m shooting at them. Perhaps the hitboxes are a bit displaced?
There are so many ghosts, that I never have time to open the chest and get the goodies. Probably because it takes a full mag to kill each of them, with the concern listed above, and me being a bit tired 
Also, they can kill you in less than a second. While this does add to the feeling of being in a horrible peril, I think you could lower it a bit. Especially since it seems that if 2 ghosts are within damage-range at the same time, they both count (as they should!), and with 30 ghosts chasing you…well, you get the picture.
The .bat file is temporary, right? Cause for deployment, it’s not very “slick”.
If you can fix these things, you have potential for a fun little game here. Please do post a new version, cuz I’d love to play it 