You got the database error probably because you clicked back on the browser to play the game. You should not really do that, just click the play button (the game is cached and should load fast).
The arcade treats scores differently now btw, I could change it so it only saves one score per player (as it was) but thought it would be more fun to have several as the comments in the score table have more meaning then.
Submission of scores is different now, it's more secure.
It was theoretically possible to cheat before, it's much more difficult now.
Bear in mind that cheating in that way was basically php injection, I was not really comfortable about people being able to inject code into the site in that way so I had to upgrade the arcade.
Cheers for the bug report
