Puzzle 1 (Easy) Puzzle 2 (Easy) Puzzle 3 (Easy) Puzzle 4 (Easy) Puzzle 5 (Easy) Puzzle 6 (Medium) Puzzle 7 (Medium) Puzzle 8 (Medium) Puzzle 9 (Medium) Puzzle 10 (Medium) Puzzle 11 (Hard) Puzzle 12 (Hard) Puzzle 13 (Hard) Puzzle 14 (Hard) Puzzle 15 (Hard) Puzzle 16 (Difficult) Puzzle 17 (Difficult) Puzzle 18 (Difficult) Puzzle 19 (Difficult) Puzzle 20 (Difficult)