This was nice to play. Pleasing graphics and chilling audio and some platforming challenge.
Took me a while to get 10 Thoughts because i had to change places because of the dragons and all I could do was lure them away but since there was 1 more thought to collect than needed it was ok.
Just some small things i would improve: the hearts in the UI don't fit the rest that much. Maybe use renders of 3d hearts or something. The platforms in the coulds were hard to see. Most of the time that was fine but at some points i missed when i thought i should get on.
Well done!