I liked both graphics and audio. The only remark is about the bear walking animation, it takes a while to notice but it feels a bit "stiff". Overall it was a very good result.
It's not difficult but I just kept accidentally pushing things in the wrong place so I had to refresh the page a few time (particularly the yellow ball at the end, I've managed to send it a few times in the pit of the second screen by pushing it too much both before or after changing from the 1st to the 2nd scene).