One of the best flash games ever!

Dino Run is a fun free flash game made by Pixeljam. Basically you are a Dinosaur of some sort fleeing from the Apocalypse. There are different game modes and difficulty settings like Challenge (Story), Speedrun and Planet D (SE). Pixeljam also made other games like Gamma Bros and Ratmaze. Dino Run also has an "upgraded" version named Dino Run SE which adds more hats, levels and features.

Pixeljam[www.pixeljam.com]
Dino Run[www.pixeljam.com]