First of all, this contest was really funny.
I know it's not my thing, but I think the price-giving is not fair.
The rules doesn't say much, but I think the game was meant to do alone.
It's impossible to have this many points alone. I think all participant can confirm that.
I tried it with my brother and we had more than 300 points on the first try.
As already mentioned, the rules doesn't say anything about this, but if you say the highest scores were cheated, why don't you say all these scores were cheated?
The rules doesn't say anything about photoshop too.