There are some tips for Level 85 at another thread. I just replayed the level, though...cuz I only had 2 stars before. So I thought I'd post a photo and a little more info about it.
Level 85: 50 double-glass in 50 moves. There are 4 jewels--1 in each corner--that are separated from the main board. You'll have to use special jewels to break the double-glass (and do it twice!) You also get presents in this level. On the round I just played, I received a diamond, a blaster, and 2 glass-breaking boosts. There are also 2 sets of portals: when you blast/clear the glass in the separated areas on the bottom (red portals,) it will pull jewels through the 2 green portals on the bottom of the main board.
Blasters, diamonds (swapped w/color of the jewel in the separate area,) blaster+bomb combos, and diamond+blaster combos are the best way to clear the glass. I just passed the level using a diamond/blaster combo, followed by a blaster/bomb combo. (I still had lots of moves left, so I made lots of other special jewels and combos to boost my score. Got my 3 stars--yay!) Try using your blaster boost next to a bomb you've made yourself, or with a diamond if you made one. Or put your diamond boost on the board, and try to get it next to a blaster you've made. If that doesn't work, you can use the blaster they give you. Choose the color jewel next to your diamond that's most plentiful on the board, or the color used the most in the separated areas. It's usually better to use the gift boosts with special jewels you've made yourself--that spreads them a bit further. Hopefully, you can knock out all the corner glass using only special jewels/combos. But if you still have unbroken glass as you reach the end, you can bust out your glass-breaking boosts to clear it.
Note: If you still have lots of moves left, and just 1 glass left to break (for example,) you might want to use up some of your moves/do some more combos first. That way you can earn a higher score/more stars. Then break your final glass...
Good luck!