Unfortunately, I feel that this game had problems with visual signaling. For example, the buttons that you need to stand on to open the exit look like bushes, and an entire segment of one of the puzzles was a red herring (in a way that I feel didn't work with the puzzle design).
Additionally, this game does not follow the "no words" theme - even though there's a great wordless "instructions" image, words are used in the UI and written in the levels a few times.
However, I think that the puzzle designs are pretty fun, and I think that this idea is totally worth using more.