Played both Sokobird in reverse order. I prefer moving along with the boxes when pushing, separating moves and pushes feels a bit weird here. The levels were are also less consistent, and the difficulty is uneven; I struggled more around levels 13-20 and the final levels were a lot easier. 

This means there was a big improvement from this game to Sokobird 2, so great job!

Still, a pretty enjoyable game.