Ok, a second off the pace, but a nice points return on the modest time investment!
A really nice simple fun level, with no stupid spikes or whatever put in the wrong places to break the flow and turn pleasure into frustration (a problem with far too many levels imo).
I'll get round to Cave Dweller at some point, but I really don't think you and Kam should lose any sleep over it. The two of you are over the horizon on that one...