Alot of the levels are extremely RNG based to get a blue rating on.
specifically levels 11, 12, and 13
And having grinded every level for a blue rating I think a blue rating on level 10 is actually impossible.
(I play on the web, and I just cannot imagine a completion of level 10 in 3 shots)
You need 1 jump to get to of the box, a second to jump inside the box, and a third to get the new larger cube into the box and onto the green square, but I think the angle to jump into the box will never let the larger cube to slide through the narrow gap and onto the green square. While I can imagine a potential 4 shot solution, I cannot get do better than a 5 shot solution, and we would need a 3 shot solution.
Am I missing something? Has someone else gotten a BLUE RATING ON LEVEL 10?