Post every instance of bug you found right here.
Also, one comment per bug, please, so that it is simpler to walk through them.

You are a little necromancer trapped in a dungeon. Where are-you, why are-you here? · By
Oops! Sorry, posted on the wrong location!
So here is what I think about how the weapon work that seems buggy to me:
The weapon launches its missile by the bottom (bottom-right), so when the character is close to a wall the missile explode right away.
Maybe it'll be cool to launch the missile from different origin points considering the shot direction
Considering the ennemies, you can play "safe": when you quickly go beyond a distance, the ennemies stop following you... but you can reach them with the missile, so it's really easy. Maybe 1. the ennemies should follow you all along after a first sight 2. the missile may have a limited range, the same size or shorter than the ennemies detection range? What do you think?