I killed zombie (really cool enemy) and skeletal but I couldn't get the spooky box and wasn't able to progress further, if there's anything else.
I like the idea of the combat but maybe an indicator to know when your attack is fully charged would be good. Visual or audio, either would help, I let go of my attacks too often and they weren't fully charged.
Overall neat idea. I like Dark Messiah and King's Field and this game seems to take inspiration from both. Hope to see your game again soon.