In starting the game, you're missing the sound bite where you explain who goes first after hiding the pebbles behind your back. Towards the end of your script, you also repeat some things. Move the "When playing the game...." sentence after the sentence, "Now you can take turns jumping over pieces."
Once someone wins, you just end the entire piece there. Can you say something about the game as a conclusion to end it gracefully instead of just cutting the whole thing right there? What can you say to end the piece?
Write something about yourself. No need to be fancy, just an overview.