Help me get off the fence on this one guys.
There's gameplay aplenty - it gets more involved as the game becomes more tricky and you learn more skills. Trine is the kind of game I think of as gameplay heavy (the polar oppsoite to something like Assassin's Creed) and is one of the most enjoyable games i've played this gen. If you're prepared to experiment there's plenty to have fun with here.
I'll be double dipping to play with mates on PSN and really hope there's a sequel.