Nice little set of puzzles! This is a neat concept. I did at one point manage to have the top ball fall down into the bottom half, which was a little weird. I also think that it would be much clearer if the two types of poles were more visually different; I never really did manage to grasp which type let which ball through, and I worked it out by trying and then hitting space if I couldn't proceed. Perhaps, if you don't want the poles to be solid black and solid white, they might be one mostly-white striped and one a regular pattern of dots or similar, so they're obviously different? The core gameplay is excellent; these are polish issues, but I think a little more attention there might take the game to the next level.