I don't imagine many people are able to beat this game like I was. It's incredibly difficult. With regards to what Geektard said, it's important to only be able to pick up blocks while standing on them so that you have to plan ahead if you're going to freeze a caveman.
Hints:
- Chase cavemen into the water by waving your torch from a distance to turn them into sideways blocks.
- Throw blocks farther by holding left or right when you press space.
- After using a block to reach a ledge, you can bring the block with you because grabbing a block will make you automatically jump. You can do the same with blocks in the water.
- If there's a block that's too far out into the water to retrieve, you can throw another block in the water to use as a stepping stone. After you grab the block from the middle of the water and land on the stepping stone, you can retrieve the stepping stone since it's closer to land.
Here's a screenshot from the last level to prove I made it at least that far: http://imageshack.us/photo/my-images/
259/cavemanprototype.jpg/