Score and Difficulty Feature

[bridgetorr17]

Explanation

• API has 'difficulty' property for API calls
• currently all of the questions from API are 'easy' difficulty, but they also have medium and hard difficulty options
• the game does not keep track of the user's score, or how many questions they have gotten right or wrong

Suggested Solution

• when the user gets 10 questions correct in one level, move up a difficulty in the API requests
• show current score in that difficulty in bottom right corner of screen
• score should be unique to that category of question (general, history, celebrities, etc)
• after this is implemented, a follow-up feature could be a scoreboard

Please make feature in a new branch