Mortimer Beckett and the Time Portal

I just got the game
Mortimer Beckett and the Time Portal
and I'm sooo frustrated!!!
I'm on the last puzzle (I think) and I can't solve (or Skip) it like the other ones I gave up on.
It's in SIr Arthur's Tower forest - the puzzle with the colored stones that you have to line up all in their categories/sizes and lines.
Anyone play this yet?