Improvements in this version:

• It's not quite so easy to get your yarns tangled, although still possible if you're not careful.
• If you hold one arrow key and press and release another, you now continue moving in the original direction instead of stopping.
• You can now squeeze in between a ball and a wall and nudge the ball away, so it's no longer necessary for me to disallow pushing things up against walls. On the downside, you now have to be a bit more accurate lining up with a ball in order to push it. To make this easier, I've added shadows under the player and balls.
• There are two more levels, and a new kind of object. I won't spoil your fun by telling you what it is. :-)

By the way, if anyone would like to join me as a level designer, let me know! The biggest thing the game needs right now is ideas...

The ability to push balls against walls broke level 4, so I've modified it slightly.