Huge improvement on the original. Has all of its same strengths—the beautiful art, the great atmosphere—and fixes nearly every one of its weaknesses.

Smartest change is to ammunition, which is no longer universal (a baffling decision in the original). This means ammo scarcity now pushes you to think better about which weapons to use in which situation. Enemies also force situational weapon usage—there's enemies that multiply on death, but not if you freeze them first, for instance. Altogether it's a smarter, better package with all the original's strengths. And it's still just as expensive ($0).