Do you lose levels if you replay old ones?

[Fruhmann360]

i just made it to the barge. i want to go back and get gold on some levels i missed. can i just jump from level to level doing this and then go back to the beginning of the barge level?

also, the combo count on the bottom...does that mean i have to do a certain amount of combos per level or is it just counting through out the game.

[o0EVIL0o x360a]

1. Yes, you can replay missions any time you feel like it.

2. The combos are cumulative through all playthroughs. They are chain attacks, not the things that pop up throught the fistfight.