Nice Halloween theme with the enemy designs, the pickups being from sweets and candies. I really like how they're giant and just get dropped down after each wave. Less horror, but more goofy Halloween vibes.
Nice PS1 aesthetic too and also gave me quake vibes.
I understand you were limited by the week timeframe for the jam. If possible, I think this game could be expanded with more enemy types and weapons.
But very nice overall.