Pretty solid game in terms of controls. The simple graphics are fine imo since this is a pretty simple game. I like the bird's expression when taking damage a lot.
The movement, unlike usual flappy bird type games, allows for a down movement, which made it a whole lot easier for me. The movement vertically is also very fast, so I felt it was easy to maneuver between the rock sandwiches. There is also a surprisingly forgiving amount of space to bounce between rock platforms, so you can time it well enough not to hit your head or your bottom. My only gripe is the damage I take hitting the screen ceiling, but that is understandable to avoid players cropping it up there the whole time I guess.