Nice graphic, I was worried that N900 being a single-touch device will suffer, but control is not an issue at all. Gameplay is a little weak after 2 levels, there are only 3 types of attack without any kind of combination (single-touch comes to mind...). Besides, hard difficulty is too easy..... Still a good game to me, though.

This free version you cannot select "insane" difficulty and can only play "chapter 1." There are two more chapters so it seems like there will be additional level pack or full version available some time later.