Ok, on the missions, you knowhow you keep unlocking new mission levels after beat the last one, right? well, after you beat level 6, there r no more levels...... wrong!!! you know after you beat a mission you get a rating on how well you did..... Triple Star, Double Star, A, B, etc. and you know how after you beat an entire level you get a ranking on how you did overall on that level? well, if you get an overall rating of at least a Single star on all 6 levels..... which is quite hard to do....... that unlocks a new level.... level seven!!!!! And it is a very hard level compared to the other 6. Hope it helped.