Very relaxing indeed, the music is nice and chill, and i liked the spritework and the lighting effects.
The "firecaves" were a bit trippy and odd (died e few times here but didn't understood what hit me) and the aiming a bit hard to lineup.
Other than the small issues i mentioned it's a solid experience, managed to get all 3 elemental books back to the shrine and had a good time, i also like that if you die you keep whatever questbook you already picked up so you don't have to do the full game in one sitting.
Good job to you guys ! :)