FK updates

Hello, been working on something adjacent to this, namely an SRD (which shall be released shortly) but figured I'd give this game some updates to bring it more in line with the SRD.

• Clarified how adding to the track and board works
• Clarified how clearing Peaks changes the flow
• Added a tip to help explain the flow of play
• Fixed a spelling error in one of the examples of play that went unnoticed

Hope this makes everything clearer in the gameplay and resolving sense.