[NKCSS]

That looks like so much fun :)

[update]

Hmm, just played 15 levels to find out I have to play $9.99/mo to continue :-/ Would be good to know that up front...

[nwinter]

Just keep clicking the red levels–those are the free ones. The blue ones are the subscriber bonus levels.

[dxbydt]

Did someone actually pay up ? I am curious to see if there's a market for something of this nature.