As a player, I would like to see the leaderboard for each level and difficulty combination, so that I can compete with other players for high scores.
Acceptance Criteria
- Each level should have a leaderboard for each difficulty mode (except for Chill). This means that there is a leaderboard for best time for level 15 in Clash, and a separate one for level 15 in Chaotic. Players should be able to look at the leaderboard after finishing a level the way they do currently.