There are a number of audio glitches that pop up throughout, included stuttering lines of background chatter and characters not finishing their sentences during cutscenes.
Triggers are useful for triggering other events in your game, like cutscenes, automatic door opening, displaying tutorial messages, etc. Use your imagination!
You can replay levels and watch cutscenes at the Leaky Cauldron, and play bonus levels at Gringotts.
Explosions, shootouts, and cutscenes will be much more epic on the iPad.