Level  20 is not solvable -- 90 emeralds + 23 diamonds + 23 nuts + 1 bug + 8 crushable 1-emerald yams = 201, level requires 203
Level  51 is not solvable -- best I can do is 95 emeralds short
Level  70 is not solvable -- 1 emerald short -- can't figure out how to get more than 6 out of the bug
