Most difficult level created in Super Mario Maker
Who
Alex Tan
What
0.007636 percentage
Where
United States ()
When

Wrestling the record away from his other fiendish creation, “Pit of Panga: P-Break”, “Pit of Panga: U-Break” by "PangaeaPanga" aka Alex Tan (USA) is the toughest level built in Super Mario Maker. As of 22 February 2018, this infuriating work of platforming art had been completed by rival players a mere 367 times from an incredible 4,805,934 attempts. That equates to a completion rate of just 0.007636% (or 0.00% on the game's official website) – the lowest success score of any Super Mario Maker level that has been attempted at least 500,000 times.

PangaeaPanga famously completed Super Mario World while blindfolded in June 2015, and honed his Mario level-design skills by using ROM-hacking tools to create illicit courses for the game. The one he made called "Item Abuse 3" is generally held to be the hardest Super Mario World level ever.