I liked the game art and the intensity of the music, reflecting the life or death situation Kiara has found herself in.
I would've liked to hear sound effects for the different attacks and when certain events happen in the game, such as collecting a feather or getting hit. The BGM was very loud and I'm not sure if there were any SFX.
Speaking of loud, I really missed having a volume slider. The audio was very loud on my PC, even when I turned my speakers to the lowest volume.
Player feedback is always important in these kind of games, where knowing if you successfully avoided damage is crucial to the game. Adding SFX and maybe a bit of screen shake and particles on screen would help communicate this. Also, since the goal seems to be collecting 20 feathers, it would be nice to show this to the player in some way, such as a counter xx/20 feathers or a bar that fills up somewhere on the screen, so that the goal is clear.
I was close to giving up at around 16 feathers, thinking it was an endless (and loud) game.