Good, but...
Its good but the sound messes up after about 3 minutes, and on my pc it slows down like hell.
AND I WANT TO WALK FREELY AAAH...
maybe a platform engine where you can walk freely and shoot and stuff...
Anyways try to fix the bugs and probs, and try to make the grunt attacks more cooler, and the ghosts musnt die that quick, and when they die, they must detonate and explode...
good luck.