One thing anyone who knows me can tell you. I love Mr. Do. It was my favorite game in the 1980s and although my gaming has certainly evolved I still play Mr. Do on MAME at least once a week. Mr. Do spawned multiple sequels which pale in comparison to the original, but were pretty decent for coin ops.
Mr. Do’s Castle was kind of like Donkey Kong’s 2nd level and it works pretty well. With its dodge and move game play and swinging ladders it translated well to the home consoles of the time.