Transformice is a flash game, where a bunch of players log into a room, and then they take control of a mouse trying to ge to the cheese. while this might sound lame, the game is fun in its simplicity, and since each map have a max timer of 2 minutes, its not a game that requires alot of time to engage.
To add to the fun, one or two of the players might become shamans who can summon varius items to help the mice get to the cheese.
One of my favorite parts about this game is the confusion that arrives when 25+ players, all on the same map. tries to be the first to grab the cheese. i usually play in room 1 since the amount of mice there are usually higher than the othe rooms. Another reason to use room one is that one of the creators of the games sometimes join the game in room 1, and then start streaming music, painting stuff on the background, and generally adding a new experience to the game.
A few months ago the creators added a map editor to the game, Which has resultet in people making easy maps and making it easier to get to the cheese, this has lowerede the difficulty of the game, and since the players decide which maps stay and which doesnt, people are more likely to give a good vote if they get the cheese rather than when they dont.
If you decide to try out the game i might as well tell you now. you will run into trolls, it cant be avoided, as mentioned earlier the maps have a time of 2 minutes, this time goes down to 20 seconds if the shaman dies, or if there are only 2 mice left in the game (if you die or gather the cheese you disapear from the map). Some trolls use this feature to not enter the hole, but forcing people to stare at him dancing for the remaining time of the map.
Gathering cheese will allow you to buy items for your avatar, these have no practical use, they are only there for the looks, very few of these avatars cost less than a 100 cheeses, so gaining these avatar items may consume a bit of time if your planning to get them.
The game is updated regularly, adding new features, such as new maps, new play styles, new avatars, etc.
I greatly recommend this game to those who are looking for a fast time killer, and its simplicity makes it playable even by those who dont have much experience with gaming.
The game may be found at http://www.transformice.com/
or if you own a kongregate account it can be found on kongregate.com. Kongregate as a portal containing flash games, its a site i visit regularly, Since i find the quality of most of the games high.