I tested my son as he played Snood. Before the game started, he described himself as bored. He then described himself at the 2 minute intervals as follows:

1. uncertain
2. bored
3. frustrated
4. pleased
5. excited
6. excited
7. excited
8. excited
9. excited
10. excited
After the test was done, he was engaged enough in the game to finish playing through the level.

Here are some thoughts based on Keller's work with the ARCS model.

Attention.
The game caught Eric's attention, probably with its novelty. You can shoot things with the cannon, and the faces are amusing and animated.

Relevance.
I fail to see much in this connection to keep a player in the game. There simply isn't much to tie in with any real-life goals. And as far as game goals are concerned, the object is to clear the level, but this seems hard to accomplish. Maybe you clear out the last Snood, but this seems underwhelming as a feature that would keep people coming back to the game.

Confidence.
As you can see from the list, the subject showed boredom and frustration at the 2nd and 3rd measuring periods. This reflects a key component of the ARCS model. If a person lacks confidence in his or her ability to deal with a situation, this will diminish both the pleasure of being in that situation, as well as the capability of dealing with that situation. I believe that the subject was frustrated because at this point he was unfamiliar with the strategy of the game.

Satisfaction.
As the game went on, more and more the subject showed excitement with the game. I believe the subject was learning more about how to place the Snoods to get more to fall down. He found more satisfaction with the game as he became more familiar with it.

However, the subject lost interest in Snood after he finished the level he was playing when the test finished. I believe this indicated that the satisfaction level of the game, or at least his experience with the game, was not high enough to bring back repeat play. My subject did not ask me to load Snood on his computer.