These are optional challenges. It is up to the developer to research what is needed to complete these challenges.
HangMan Game: https://github.com/cs-fullstack-master/javascript_games_hangman_starter
Mario Animation with Event Timers: https://github.com/cs-fullstack-master/javascript-events-timers-cw
Show/Hide Game: (this one fun and while not perfect uses click events and stuff Shows images for some number of ms then u have to remember where to click. Make me a different/better version) https://github.com/cs-fullstack-master/frontend-halfday2-showhide-game
Higher Order Array Methods (powerful stuff!) https://github.com/cs-fullstack-master/JavaScript-MapThisObjects-cw
Events and User Input: (this one is great for messing with friends because regardless of what they type, you can replace each character and say whatever u want! 😛 ) https://github.com/cs-fullstack-master/html-javascript-events_b-cw
Scope: https://github.com/cs-fullstack-master/JavaScript-objectscoping-cw
Misc JS Challenges: https://github.com/cs-fullstack-master/javascript-optional-challenges