Nice

It's a nice concept, but you forgot to add the addictive element. It's slow paced and the puzzles aren't that difficult, so it isn't exiting. Maybe either add a timer or make the puzzles more difficult.

Different.

Not a watered-down clone of everything else that's cluttering the portals, but not too interesting at the same time.

I really don't know how to make this any better, so I can't offer any constructive criticism. But, you went out on a limb making a game like this, Haha. Not bad, but not ground-breaking.