Wow, the game is ~20MB while the Java version is ~300KB IIRC. Must be a big difference.

Nevertheless, its a fun game and I'll make sure to buy it when its released.

EDIT: Kinda big difference from the Java version I see

Anyway it tells me I built as high as you can in the free version, but when I press the option to buy the game nothing happens. I guess its on the way though.