Thanks for the feedback! Really happy to hear that you finished the game and liked the ending, that's definitely the highlight of the game for me as well. The SFX were actually supposed to follow the chords of every music track, but I only had time to add that to the first layer. But at least it works really well there!
mayyyybe the arrow was a little too big hahaha. I think 3D sound effects for this bundled with a more subtle visual hint (such as light rays?) would be a better fit if we had more time.