These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: The Strong Arm Machine. It makes missiles the only hazard, not a single coin will be dodged, and it has three hit points. If it's used skillfully, it could make you top the leaderboard by covering a lot of distance.
That One Attack: With S.A.M., there's probably two rare missile patterns that's literally impossible to deflect every single one without making S.A.M. lose one Hit Point. The other pattern, known as the middle, top, and bottom missiles in quick succession is this to some; it's more common, but at least it's possible to deflect every single one of them successfully.