Thank you for this detailed feedback!
1. It is not almost impossible to finish the game unharmed, it is absolutely impossible to finish the game unharmed, as there are endless waves :) The ending should change based on the waves defeated, but we had to cut this part sadly.
2. You are absolutely right. The original idea was that this soaring fear would create a "magic explosion", and this wipes the remaining wave. But we forgot about adding the corresponding condensed fear.
3-4 We didn't have time to playtest the final configuration, these would be nice changes.
5. I couldn't make sure that evrything gets resetted properly, so instead of a possibly buggy restart, I opted for browser reload, hoping for causing less fustration this way. So I agree that a restart button would be nice.
Thank you for the kind words!