Very engaging.
When you play you start off at the lowest power level and must find and shoot elebits to unlock certain objects' switches so they also produce more elebits. You can also find elebits by opening cupboards, doors, under opbjects, and inside objects such as vases and flowerpots, etc. And different colored elebits offer different results like wattage, upgrades for your capture gun lifting capabilities, and unlocking modes. There are also items within each stage to assist you in capturing the elebits.
Story is O.K. but not as bad as what has been said about it. Other than that this game is fun. Get it. It's cheap to buy.