Just continue through the level and you will find yourself in a mini game. Here, this guy will throw a Gordo which you will only see for a few seconds. Now, try to guess which Gordo it was. Get all three rounds right to make this guy happy.

*NOTE TO EMULATOR USERS* You can just cheat with save states, or press 1-6 to adjust the layers and see through the blocks to see the Gordo! But you probably would have rather not known that.