A fun idea!
I think it would have felt better to move the pipes smoothly instead of by increments but the game works well!
I'm not sure about the width of the window though, I understand it's to emulate a phone screen, but with the speed of the pipes, I can't react fast enough, when a pipe is at it's max height I know I won't be able to lower it in time because I click too slowly.
Cool game!