Well actually that preview put it pretty well: "Tower Defense... where you're the Tower"
I'd actually, humbly argue that it's more akin to a bullet-hell shooter... frantically tapping the iPad thousands of times a minute and trying to get in "the zone" - that sort of thing.
Glad you're digging it SanaeAkatsuki - if you (or anyone else here) would be interested in checking out, just drop me a line.
In the meantime... another piece of art!
That looks awesome!! Nice one!!