Is it enough to say brilliant?
I love the concept this game really is a challenge. The biggest problem is that, like you said, it's too freaking short, and at the beginning it is confusing, but one you understand what you have to do and in which order, the game is really fast.
I am looking forward to that "longer version" you promised. I really think that waiting might be worth it.
Big ups to this types of games keep it up guys!