# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2011-06-23 13:14:17 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/83885587064553472) RT @mattgemmell: It's Sonic the Hedgehog's 20th birthday, so here's a brilliant Green Hill Zone birthday cake: http://t.co/TMRKIK8