The incentive would be to complete the Beta version of Sunset Vista. In 2014 we had an incentive for Stormy Accent, a level that was removed from the final version of the game due to its excess difficulty. Crash Bandicoot was nerfed heavily during development for this same reason, but there is a prototype version that has level layouts that are considerably harder than anything that made it into the final game. Sunset Vista is one the hardest levels in the game and is even harder in the prototype, which is why I selected it as the incentive.
Also we will port the level into the final version of the game so that there will be music, proper physics, and what not. This doesn't really change anything besides make it more pleasant to watch.