I'm already stuck on 1:5 ... Is that pathetic of me? I can't tell. I'm sure if I weren't distracted by work, I could probably figure it out... However, the music is awesome and I'm happily letting it play in the background.
I got to this level - I haven't had a chance to look at it though... I went to lunch instead... EDIT: That didn't take as long as I thought it would... I'm definitely getting the hang of this game.
I played it periodically throughout my workdays since Thursday morning... I got stuck on several levels (3.4 being one of them) but I finally "won" yesterday afternoon.
I played through until I got to 3.6 I got stuck there for long enough that I cheated and found the answer. I signed up on their website for email updates whenever the full game is finished. This is a definite buy for me. I love this type of stuff.