I beat the game, I don't know how, but I did it. Mechanics are a bit confusing, but for the rest is a solid game.
I noticed now the explanation on the page, I would also add that you can keep some doors open with the laser.
I'm a bit conflicted, I love the kaiju battling loop and it's incredibly well done, however I didn't appreciated the platforming phase as much finding it a little to hard. However I'm not considering difficulty in the ratings since my group didn't have much time for balancing either. This game split for two player could be mazing, with one doing the kaiju battle and the other climbing the castle.
Also the crab looks amazing.