It's pretty good!
I enjoyed it, except a few levels were (are) confusing. I'm figuring them out though, and it's a great puzzle! Nice job!
Oh, and fatloot, I don't know if anyone else has beaten your level, but I did. I even had to take the screenshot of it just because it was that hard! Thanks for the challenge. =D
And just a comment on the "BTW" portion--that is slightly offensive because it reminds me of a math teacher telling you that the extremely hard lesson you just learned is so easy that you should be able to take the test the next day.