Just curious, but how long did it take you to get through the campaign each time?
I was estimating something like 5-6 hours, but I think I'm at about 4 right now (been playing in short spurts) and only level 9. I was trying to "speed run" them as much as possible, but I ran into a hiccup where Titan, Nessus, and Io all have a minimum level requirement so I end up having to grind levels. I've finished up Nessus but need to get to 11 for Io. Kind of a bummer. Had to grind out 1 level for Titan as well.
Also, I swear you had mentioned a leaderboard of some sort. Where was that at? Wondering if it's a ranking for every player and how I did. I didn't poopsock much until the weekend.