It had me with two simple words...
At first, the controls can be a bit difficult. Mainly because of Marina jet controls. You can either press a direction on the D-pad twice for her to use the jet in that direction (movement is controlled with the D-pad, analogue stick does nothing) or you could press the C-buttons in any direction to activate jets. But, using the jets with the D-pad method makes her move faster than C-button jets. It gets more confusing than that, but you eventually get used to it. Usually my reviews are alot longer than this, but I'm just doing this as time filler cause I'm about to go watch a movie. So, bottom line, if you can find Mischief Makers, buy it. It has, I believe 60 levels or so, so it will last you a while even if most of the levels are about 5 minutes or less. I'm through about 40 levels, and plan to dedicate a day next week to completing the rest of it. It's an overlooked gem for the N64 that is definetly worth playing.