It's too bad people don't understand that the whole premise of these puzzles depends on you not being able to wait a turn.
I'd really like a fast forward button, though. And an undo button.
The level select is glitched. When I hover over a level on any page, it tells me my score for the equivalent level on page 1.
How many levels are there, by the way? It looked like there were only 16, but then it added a page.