I’ve only played the Game, so I can’t make a comparison. I’m in @Pakari’s boat with Heroes–don’t have much interest in it, tone-wise or gameplay-wise.
That being said, I only played the Game for the first time, like, last year or something, and it was not the best of the multitudinous BIONICLE games I’ve played. The controls on a keyboard are a massive pain. The gameplay itself isn’t bad, though. There’s a good amount of variety between levels (though Kopaka’s is admittedly a bit disappointing since it’s only snowboarding, and Pohatu’s is just… what…). I also found the difficulty to be relatively appropriate, at least for me (except for that darn Kane-Ra hallway in Onua’s level!).
It did feel unfinished, or just… underwhelming. There just wasn’t much to it, ultimately. I would have appreciated more differentiation between Toa apart from the mechanics of their levels, i.e. incorporating their elements (why can only Gali do the cool Nova Blast thing…?). It’s definitely not the worst game (that easily goes to The Legend of Mata Nui Rebuilt), but it falls short of being more than mediocre. Some points are cool (Gali, Lewa, Makuta boss fight), but the majority of others are just meh.
And the controls are really, really, REALLY awful.