I played the first game "Playing with Letters" a while ago, and to be honest, I needed help with most of the puzzles. It was still a very great game though, so much so that I was extremely motivated to see the secret ending. I came back and was glad to see there was a sequel.
Honestly, the game is great. I love puzzles like this, and solving them on my own was much more enjoyable. Although the two games are a bit bare-bones, that aspect adds to the creep factor. I'm looking forward to catching Noel once and for all.