I like the idea of changing columns it does add a dimension to the game!
I think the visibility is hard since the bird is massive and you really have to guess where the gap is that you can enter. Maybe moving the camera a bit back or reducing the bird's size would help? or maybe even some sort of transparent thing or outlining the pipes even though the bird so you see where they
Also, it'd be nice to move around with AD as well as arrows.
Besides those the gameplay, sound, and art are quite nice.