I tried it and noticed that many textures are missing. You should bundle them in your maps directory so they are available when you distribute or publish your game. But that’s only a side note.
There are no problems with the physics for me? The player moves as he (presumably) should, all boxes fall down and collide nicely.
You need to set the animation speed in your Lua script using “setAnimationSpeed(object, speed)”. Try some values and stick with the ones you are comfortable with. You alternatively could change the frame rate in Blender to be slower.