I don't think I can exit the first stage?

This still seems to be bugged for me. With only a single 1/1 enemy on the field, I used the bite ability. This killed the enemy but still reduced the skill power to 0. If the description of the skill says that it gets stronger after every use, having it get weaker for any reason seems strange.
Edit: I intentionally tried killing two enemies at the same time to see if that helped, but it still reduced the skill power to 0.
Thanks for the quick fix!
I also tried to see if there was an end to the demo. Act 6 was kind of tedious (regular beasts had 1.48 million health) but I made it to the Guardian. Unfortunately, his first attack was unavoidable death:
So I guess that's the end of the playtest :)
Looking forward to more updates!
This is a super game! Audio and visuals are well designed and do well to set the mood for the game.
Minor suggestion: I think the Winemaker's combat trait should be updated to read "After taking damage, give another random follower +1/+1 until end of combat". As currently implemented, it seems like the Winemaker cannot give himself the bonus, so rewording the trait for clarity would be helpful.