Crash Bandicoot/N. Sanity Beach

You begin the level washed up on a beach. Head up the path and defeat the crabs. Make sure to collect the Aku-Aku Box. Soon you will come to a vertical climb. Climb up the cliff. You'll find another Aku-Aku Box as you climb, and even a box that contains a 1-Up. Here, you enter the second part of the level. Collect the final Aku-Aku Box to become invincible for a short time. Cross the passage, defeating the turtles, and breaking the crates. When this is done, you will come to a fork in the road. Choose the path you prefer, before the end of the level they rejoin. Choosing the one on the right will lead you to a large chasm. Hitting the box with the "!" will make a crate bridge appear. These is a 1-Up in one of the crates.

Being the first level of the game, it is very easy to pass, but getting the gem is not. At the fork, you will have to follow the left path to the end, then go back and take the one on the right. After creating the bridge of crates, you will have to destroy them one by one, jumping on them and without falling into the hole. And of course, without losing lives.