Cool. They where really fun, had a lot of trouble with the 1st and the 5th.
Puzzles
For the first puzzle you said:
"If Black were to decline the sacrifice by 1...Kd6 then 2.Bd7 mates"
I think you meant 2. Bc5 mates. I would put the other variations in the move list.
Puzzle 4 needs a comment to say white to mate in 2. I wasted time looking for mate in 1. I think composed puzzles consisting of hypothetical positions should have a label saying the number of moves till mate for white/black.
Otherwise, a fine collection of puzzles.
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Here is some puzzles from Polgar's book on tactics (the one with 5334 different puzzles). This book is very good because it not only has thousands of puzzles on tactics but it also has puzzles on the endgame and combinations. So all these are mates in two moves- you make a move and no matter what move the opponent plays you will be able to checkmate him on your second move.