I was deeply impressed by the "Colossus", but I didn't like the need of killing these likable monsters by hitting the sword into their head.
Nonetheless, the story was very well though out. (Although, I don't get why authors all around the world think, that there is the need of stories with the nonsense of something inconceivable evil.)
Now, they seemed to aim for a gameplay where the monster is your friend.
I'm tempted to write a code where you can climb up a monster, as well!

That shouldn't be too complicating, but noone will ever achieve such elegance of the animations and movements as you can see in these scenes.