Trackmania Sunrise is simply fantastic. A brilliant brilliant game. It offers up that (now) rarely-seen style of gaming that is pure unadulterated joyous
FUN. If that sounds good to you, you want to buy this game.
Also to unlock the later "missions" you still need to get golds in every race/serie cup. And i hate those cups. Especially when trying to do the gold version of em.
No, if you lower the difficulty (which of course you can do at any time) you will NEVER EVER need to get a gold serie cup!!!! (unless they've restricted one or two of the Puzzle or Crazy tracks, but I don't believe this is the case). I have completed all Races and all Platform tracks and was never (once I lowered the difficulty) asked to attain a gold cup.
You will need the occasional gold
medal, and (towards the end) an occasional
silver cup, but that's it, and as you can decide for yourself which tracks or track series to try to achieve this in, it's not a big drama.
You can see
most of the game only needing bronze medals (which is a requirement that should only cause any kind of serious challenge in the very final set of tracks for a game type).
Oh, and missing a jump in a race does
not (in general, at least) force you to start over from the beginning unless you're going for a silver or gold time -- simply reset to the last checkpoint and you'll be fine. And if you were close enough to the checkpoint, you'll often still be on for a silver medal.