This is a pretty fun game.
I've played both versions so far, and I have to say that I like them both. On this one, I did like the fact that you used a blue color for the background, just to make it a bit easier on the eyes when you're keeping the mouse away from the walls and objects. It does stay challenging too, especially with that one new level. Sure, it may take a while to beat, but it's worth it. Nice work.