World of Goo is a physics based puzzle / construction game. The millions of Goo Balls who live in the beautiful World of Goo don't know that they are in a game, or that they are extremely delicious.
This is one of the best indie games I have (that says a lot because I've all the humble humble, indieroyale and indiegala bundles + some other indie games).
It works on my 4 year old netbook with ubuntu. It has good artwork, great astetics and a fantastic soundtrack.
The controls are simple and they work good, but I recomand using a regular mouse instead of a touchpad.
The only downside for me is that the time to beat the game is not very long.