Bitcoin Q&A: Lightning Network Game Theory

Can the rules of the Lightning Network be updated easily? How does it use the consensus of Bitcoin? What are other implementations (Lit, Raiden)? What are the options for channel funding & creation? What is the benefit of commitment schemes? What are hashed timelocked contracts (HTLCs)? How does the mutual guarantee against cheating work? What prevents malicious use of the revocation key to steal coins?