Awesome job! This was a lot of fun to play: the abilities were fun to use and art and music were fantastic and really made you feel like this little flame in a dark world. Really loved the flame animations!
What triggers the end? I only had 3/8 crystals when it ended so I wasn't expecting that. One possible bug though is when I restarted after that my health was reset to 10/10 again, but it still showed I had 3 crystals, so I'm not sure if that should reset too.