Hey!
If it comes to the wizard death - it's not a bug, it's a feature. By the design, this prototype is unbeatable.
The Angel of Death is always to be spawned - with wizard either completing the ritual or dying. The concept is that ritual needs death energy - currently just from death of the hero or wizard. But it may change in the future e.g. to prevent unit spamming.
However, camera should move after "cutscene" so it may be either a bug or you have edge scrolling disabled.