The concept is simple and fun.
Some music and some sound effect can surely improve the game.
I din't understand why the dog keeping disappear on the right side of the screen, then I realized it was a mobile game. I played on mobile and things starts to make sense XD
I played through all levels and I can say that the level desing is pretty well made, with some hard jumps that took some attempts to overcome, but not too much. Well done!