Thank you very much! Love your video :) you will be first forever :D
I will answer a couple of things:
1. Why you didn't see that you took damage - damage wents in first, then regen happens - so basically you regened the damage.
2. You didn't notice that when you switch levels, all the visible enemies deal "attack of oportunity" - I think I will put a warning there.
3. Tutorial is something I'm planning to add for the Steam demo :)
4. Potion of Rebirth says that it removes all cards. Maybe I will put this part in red color as a warning :)
Please check out the today's 0.18 version - I think it is worth it :)