I just before was looking up a word and guess what....I spy with my little eye something that is....red.
I did wonder though whether instead of the skritter mascot, wouldn't it be better to add a small flash window (like a mini version of that flash introduction you had on the starting page at the beginning). In that flash thing you could just show a character being written and then being marked correct or not:)
I'm not sure whether people really get how cool skritter is based on the short text in the add...so that might really capture peoples attention.