This is ENO's latest marketing wheeze. Presumably aimed at the under-5s, it's a game where you.....well, hit the button above and see for yourself. Something with loads of stabbing and candlesticks might have been more fun though. Feel free to share your scores - I managed a miserable 5 first time round.
If you want to enter the competition, it might be safer to do it on ENO's own site.
Disclaimer - As the above is basically an advert, I assume ENO won't mind me reproducing it. I am happy to remove on request if not.