Wonderful little game, truly a breath of fresh air when it comes to games of this type!
Controls were fairly intuitive, although it took me a while to realise I had to start from 0. I forgot to read the instructions here and there weren't any in game, so that could be worked in next time!
Apart from that brilliant game, challenging but not impossible, decent quality pictures, well worth playing! Only other criticism would be its too short! Can't wait for the next one!! ;p