This is a very good game, I have it for GP32.
Its gameplay system is far more interesting and deep than you may realize from that video. It's a really top notch beatemup. In its day on the old GP32, it was a flagship game demonstrating the GP32's excellent 2D graphics.
However, in 2008/2009, on a new and powerful device like Wiz, it shouldn't cost more than $10.