Sure it contains many unique features (I'd really like the bosses), but I've already seen a few games where you are stacking blocks (I don't remember exactly which games, but I've also seen one where the character needs to get up) in the previous GDevelop BIG Game Jams.
But I've updated the idea rating to 3 as the boss fights (and also a few other features) are really good and unique. Great work!