These are just my opinions on each game:
Super Mario 3D Land feels like an indirect sequel to the Super Mario Galaxy games (if you've ever played those). What I didn't like about the game was the after-"story" (stuff after the main levels/worlds), though I'm not gonna say why. New Super Mario Bros. 2 is pretty easy and short, to be honest (unless you're going after all the coin goals). Trying to 100% the game might be a pain, though. Kingdom Hearts 3D is actually pretty long, even moreso if you focus on raising a Spirit team. What's annoying is the Drop system which forces you to swap between Sora and Riku when a meter runs out, and at some points in the story you're forced to swap regardless of how full your meter is. Theatrhytm... Well, I've only played a demo of it, but the game seems like a good rhythm/music game. The hardest difficulty is so brutal, though ;~; *cough*handcramps*cough*
Super Mario 3D Land feels like an indirect sequel to the Super Mario Galaxy games (if you've ever played those). What I didn't like about the game was the after-"story" (stuff after the main levels/worlds), though I'm not gonna say why. New Super Mario Bros. 2 is pretty easy and short, to be honest (unless you're going after all the coin goals). Trying to 100% the game might be a pain, though. Kingdom Hearts 3D is actually pretty long, even moreso if you focus on raising a Spirit team. What's annoying is the Drop system which forces you to swap between Sora and Riku when a meter runs out, and at some points in the story you're forced to swap regardless of how full your meter is. Theatrhytm... Well, I've only played a demo of it, but the game seems like a good rhythm/music game. The hardest difficulty is so brutal, though ;~; *cough*handcramps*cough*