It was good, really liked the artstyle and designs, especially the owl mask monsters. I liked the idea of the powerups, but i felt most of them didn't have a big impact on the gameplay, like the light and hearth ones kinda are just a "this one can damage shields" and "this one can damage darkness stuff". I think these two could be better flashed out, like for example the earth one had a shield to protect from enemy attacks, maybe it could also protect from the spikes to go through extra paths, or one thing i found out when playing, though i am unsure if it was intentional, if you put the shield and run against a big enemy the player can push it, maybe there could be puzzles to push those enemies to a pit or spikes, that could be cool. Green powerup was goat tho, lots of mobility with that one, me like.
Other suggestions I could give are maybe add controllable jump height, I beleive it would make the game feel better to control.
The environments were pretty well made tho, nothing to point out there, it did feel like a world that could exist!
In conclusion, I think it was pretty solid, nicerino!