Thanks, glad you enjoyed it! There's a lot of great Move software out there that too often gets overlooked. Hopefully this helps to show that.
There are a good number of non-kiddie Move titles. KZ3 and Infamous 2 as you mentioned, plus Resistance 3, SOCOM 4, RE5, Heavy Rain and MAG also work great with Move. House of the Dead and No More Heroes aren't exclusives, but both are VERY mature.
Cool, glad you're enjoying too! True, it's not a particularly demanding game in terms of difficulty, but I didn't find it overly easy either. Breaking the high score records and getting all the gold medals on hard difficulty takes some effort in quite a few of the events.