Level  51 is not solvable -- no exit
Level  65 is not solvable -- 10 emeralds are unreachable (numbers 3-6 and 18-23)
Level  76 is not solvable -- 2 diamonds are unreachable / need one more dynamite
Level  81 requires 2 players (design, not a bug)
Level  82 requires 2 players (design, not a bug)
Level  83 requires 2 players (design, not a bug)
Level  84 requires 2 players (design, not a bug)
Level  88 requires 2 players (design, not a bug; a single spare dynamite or even a well-placed rock would fix this)
Level  89 requires 2 players (design, not a bug)
Level  90 requires 2 players (design, not a bug)
Level  92 requires 2 players (design, not a bug)
Level  94 requires 2 players (design, not a bug)
Level 100 is not solvable -- no exit
