See those single player Challenges that u play with Bronze medals
Here is what i think need to be changed.....put an actual timer instwad of a bar that drains slowly
And make a leaderboard for people to speedrun and compete
I think this will make the single player Experience something more than "i need 5 red star rings"
And also would make for some very cool team cooperative speed runs if the 4 player mode got its own seperate leaderboards