This has really caught my attention. I am not brilliant at spacial awareness puzzles, but this is a really captivating. The difficulty arrises when you run out of curves and only have straight pieces or when you only have curves, blah blah blah. I ration myself to one puzzle at a sitting or I find it hypnotic and can loose myself for hours. Be warned.
Not one to play games on my Kindle Fire HD, I downloaded this as it was free. It is a colourful, addictive frustrating game which is fun to play. Just give yourself plenty of time to play once you start!