I played against myself and on the same machine and the networking seemed to work.
The mechanics of pushing and pulling are easy to understand and give the potential for a lot of fun.
The game has a very cool art style and nice animations, especially going up the tower. I like that I can over the grass and flowers to flatten them - a nice touch.
The character falling to his back and getting stuck happens when very close to the edge. Other than that the game seems to be working well! Just be careful about players joining with the same name. Great work!