Party

The Party Skin is one of the five selectable skins that serve as backgrounds. It features all of the Nitrome characters (up to Ice Breaker: Red Clan) surounding the Nitrome logo.

There also appears to be some new characters, that will probably feature in a new game. On the far right near the corner, we can see to green creatures that very look similar to zombies, given that one has an exposed brain, and the other has maggotss potruding from it's head. Behind them we can see a character that looks slightly like the man from Toxic, and he/she is kicking the zombies away, meaning they are probably enemies.

Above them we see what looks like a plant with teeth and a mouth at the centre of its flower, so we can assume it is an enemy. Weather it is part of the zombie game or not isn't clear.