Really cool concept! I think what could make it better is if the vertical and lateral movement speeds were swapped (e.g, can move up/down faster than it scrolls). It might help make it easier to maneuver between the obstacles.
Viewing post in Flight of the Elements (DEMO) comments
I don’t think speed is the root issue. It’s that the player might nit make it to the right height before the next obstacle arrives because of the position they started at. For example, the player could pass an obstacle that left them at the top of the level while the next obstacle needs them to be at the bottom.