I had a lot of fun playing the game! If you do some more development on the game an idea could be to place some static/fixed objects in the train (bags etc.) :)
I had a lot of fun playing the game - the silly physics are awesome and the challenge of the game increases with the levels (which is nice). I might think that the level with the line of pots are a bit unfair, but if you watch the video you might see why :)