Going all the way back to 1983 today since being pro means that you play more than just games that came out in the last five years or so.
So, in Crystal Castles you have to make your bear gather up all the gems in each level. Once all the gems are collected you move on to the next one.
But what if you want a bigger challenge... or just want to skip ahead a bunch of levels?
From the first stage, walk up to the back corner of the playfield. It's kind of hard to see in this picture, but that's mostly because my bear is behind a giant wall.
When you get there, jump. Then you jump ahead several levels where the enemies are more plentiful and more dangerous. Don't say I didn't warn you.