some suggestions for you, if you want to make them that is
1, Although a lot more hard work, maybe you can allow words with descriptions and spaces, numbers, etc...
2, although cheating (by pressing the back button) is not really a major problem (after all, the only person they are cheating is themselves), maybe this can be prevented?
3, something that I would like to see is some type of intregration with the arcade so users can play and will get a score based on the number of correct words guessed (but maybe this could wait for a more advanced verson of the script)
if I think of anymore, i'll let you know