Wow, thanks, I didn't expect a so nice comment. There are 4 endings, depending on: a) whether you discovered the name of the bad guy or not, and b) whether you took the spear (touched it while possessing an enemy) or you stayed as a ghost and possessed the bad guy. So if your ending only shows the bad guy killed by the spear, that means you didn't discover its name and possessed it instead of taking the spear: you said your own name after possessing him, forcing Katunga to kill you both. This ending is the one called "Sacrifice". I'll add a "Tips" section on the game page to explain the endings.
I'll play your game right now. for sure