Very nice work for someone at your age! I think you should have a page where it displays all your pastes/snippets, so you probably have make it store the data locally. That's just a suggestion though. :)
Btw, are you taking Computer Studies/Computer Science for your GCE O Levels?
Uh? That's because you didn't put the line break tags.
echo "<img src=\"http://www.habbo.com/habbo-imaging/avatarimage?figure={$row['look']}&action=wav&direction=2&head_direction=3&gesture=srp&size=l\" id=\"user\"/><br />
Username: {$row["username"]} <br />
Mission: {$row["mission"]} <br />...