Good job! I had a hard time with the T-rex initially, but on easy mode it was easy peasy (the T-rex is just static in a corner, right?).
In the second part, though, it was not so clear to me. I ended up doing two or three of the tasks, but then the game stopped accepting my keyboard commands. I'm not sure of the reason.
Pure curiosity: Did you record the voice for the men in the city? It was a funny touch to hear them complaining about work in front of a caveman twice their size :D