My three biggest complaints with this tribute (which for the rest is overall decently done, mind you) are :
1) There's little point to using the gun until you've upgraded it with the explosive bullets because the combat knife, while riskier, does kill enemies way faster;
2) I feel like the hit-boxes for the enemies are a bit wack, when you stab them with a knife, they can easily damage you from a few "meters" away even if their sprite doesn't touch the player character's in any way. Same kinda goes for when you shoot them. Sometimes it shows blood, confirming a hit, but more often it doesn't making me personally unsure if the bullet hit registered or not;
3) Out of all the upgrades, I don't see why you would not buy the explosive rounds once you can, as all the other options are inferior unless you fancy a challenge.
And one last minor complaint is, there wasn't enough shotgun ammo in this chapter to even justify really using it which is a shame. My point being is that way it feels useless if you can just use the handgun (with much more ammo to find around for) in combination with the knife.
Anyhoo, all that said, I'll be awaiting a second chapter. Can you already tell me if it will carry over saves from this one?