In unfair Mario you know which way to go, but it has so many mean traps to let you die. You overcome them by time and remembering the positions.
In your game I don't know what I should do. I tested about 10-20 deaths and just give up. So you need probably something like a hint system, which doesn't tell the solution, but guides the player a bit in the right direction.
And yes, making the equalized voice less frequent would definitely help.