Great , on more artifacts !

Why not using A8 ? no license or no major 3D features needed ?
or perhaps you plan another 3D engine port of your game ?

(The too big and too stretched plant sprite will be to remove !!)

Some indie people have done sucessfull games on Iphone like this one that i think is very like system gameplay as you pllan perhaps ?

Xenome


So i think your game will be some sort of graphic enhandec version of this iphone one, but with it's own graphic things
and original gameplay elements ?

Keep it up !