What game engine should I use

[Rambutan]

Hey,
I just got an offer to develop a rather simple game (2d) for a friend's company. Some quick cash and I guess it will be pretty fun aswell. I have game developing experience from before, I've been developing simple 2d games in python/pygame.

What I'm looking for is a library or engine very much like pygame - simple, that is. Pygame, for those who are unfamiliar with it, pretty much just gives you ability to create "surfaces" and then just draw on them. (game loop structure: update, clear display, draw objects) Boxes, lines. And also using a set pixel function that lets you pass a coordinate and rgbcolorvalue to just set a color of a specific coordinate on a surface.

Is there anything this simple and lightweight worth checking out? Because that would be perfect for my type of game as i want this game finished asap.
(if i got an offer to do this in pygame i would do it in 5 minutes, except the networking part, just to clearify)

Its worth mentioning that the game will be a multiplayer (1-4 players) game thus i also need some networking capabilities. (ofcourse not nececarily included in the game library). The data (coordinate of a player on a 2dplane on gamestart and moving angle continuously) is being sent from every client to the other players when the moving angle of a player change. We are thus talking about small amounts of data.

Ive done some googling and cocos2d seems to be a pretty simple library, but im not sure. Now im looking for your advice both on the game developing part and networking.

The game is kind of snake-inspired if that makes it easier, wish i could say more.