They seem to be pretty rabid nintendo fans, but something about them is odd. They actually suggest that Sadness only be played by people over 21.. I'm sorry to be suspicious, but nintendo is well known for being stingy with who can develop for their systems. And letting an upstart with new IP's that don't exactly fit their "family friendly" be a third party supporter for them is an interesting turn for them. Then again they've been taking a lot of interesting turns as of late.
BTW if you check their site you can find some songs for some of their games, kind of low qualtiy (almost sound like MIDIs), but they get you a feel for them . I like the raid over the river one!