This is the 5th of the "Star Revenge" Series of SM64 hacks. Not directly visable in the name but this is a remake of SR0.5 UL. The 7 main courses share the same theme with the old hack, but the models itself differ a lot.
For the most part you play as Mario and find yourself in front of a Castle after being send away by a trap in the past. There are 70 stars to find which are mostly easy but some hidden stuff here and there to explore with 3 different endings to this hack.
Edit: I'll elaborate a little.
it was pretty much perfect
i've played a few of these hacks and most of them are way too hard but like not in a fun way. this was the perfect balance of hard and fair. if i had one complaint, its that it didn't go on forever. <3 thanks for making my empty life a little more fun