Nice entry for the hard mode challenge! It perfectly fits the theme image! This also  remind me the Tower Bloxx.

I feel the games is not too hard before Level 6, and then Level 9 is dramatically hard because of the wind. 

I used 325 blocks and almost finished Level 9. My heart was broken when the three towers fell as dominoes XD

Very nice look & feel realy like this one, also provides a lot of possible playing time due to the level system!