Escape from Simian Island

This game has an average grade level of about 6. It should be easily understood by 11 to 12 year olds. My students find this game to be more difficult, but also more fun than "A Day at the Beach" by the same author.

Readability Indices:

Flesch Kincaid Reading Ease 85.6
Flesch Kincaid Grade Level 5
Gunning Fog Score 7.2
SMOG Index 4.5
Coleman Liau Index 7.7
Automated Readability Index 4.7

(Source: read-able.com)