It fits perfectly actually- the sheet music compiled is just the 'lead' instrument of the songs after all. CT is pretty simple music, anything that is done on it's soundtrack is just as easy on piano as it is on guitar, if not easier to be honest.
I just took a look at ocean palace: it's one of the easier songs to transcribe, one of the easiest to play. The only vice would be volumetrics, attempting to get the fading and rising volume on each note correctly. If you've ever listened to the jazz album 'brink of time' you'll see just how good undersea palace works, as well as the whole sound track (I especially like guardia forest). It should be noted that most of the songs will need both a rhythm and lead guitar though, so 2 people if you are wanting to play the real thing in an 'orchestra' like setting that CT does. Other wise you could just play the rhythm or just play the lead. Very few songs can be done on one instrument.