I have a taste for weak or flawed games, so dropping this from a 2 star (worth a peek) to 1 star (shield your eyes) is something I do with much consideration.

The navigation through the levels, the key element of a 3d collectathon, is fine. The adventure elements on the front half of the game are also decent for a kid's title with no difficulty slider. That said, the combat (the other 'half' of the game) and the scoring system are the major problems. The combat is a cruddy replacement for Luigi's Mansion's ghost fighting, and there are only two enemies in the entire game, with only 'stronger' versions whose attacks fly across the screen faster and faster. Their three attacks (rolling from the easier enemies, punches and projectiles from the stronger) are all both brainless and annoying to avoid. There are 3 bosses (and a final boss who is a boss rush) and not one of them is good, they just become increasingly less bad starting with the first.

The capstone is that you are graded (with A being the highest) on each level and each objective category in each level, which is cool, but you cannot see whether you've perfected the level before you leave and sometimes you cannot backtrack to get more points. You also cannot return to completed levels which means you cannot decide to replay just the one or two levels you are missing things.

The game isn't worthless, but it may as well be because it would be better to spend time on a literal unknown than expect anything from the Twonkies.