Nice art, it has a quite a unique art-style, being simple but that perfectly conveys the message, I like that creative laziness doing more with less. The concept of the game is really good, adquiring your basic movements via mirrors, it has a good music that fits within the theme.
There is certain small things that could improve the experience of the game like making the movement of the birds a bit more predictable? (making the movement a bit more smoother and clear the path of the bird) and/or having the collider of the bird smaller. Maybe you can make the attacks of the player more impactful when it hits the enemy by making a small freeze and having a particle effect.
Even though the game is small, is really well polished experience, it's kinda sad that not many people will try this game because is really well made and is really good.