Cool concept, and definitely earns massive points on the demake scale for taking a highly 3D game and trying to make it 2D, but between graphics that don't mesh well with each other and gameplay that feels incredibly un-fun, glitchy and tedious, I can't say I'm a fan of the execution. Song that plays during it is actually pretty decent tho.
That being said though, best as I can tell you don't have much experience with making games, and honestly? This is Super Mario 64 if my older games are Big Rigs: Over the Road Racing, and GameJam games can be hard to make even if you do have experience, so I've gotta give you credit where credit is due: You put out a game with gameplay that functions at all, and managed to do it in an incredibly strict time limit. And it's very possible, if not likely, you managed to have fun while doing it! And really, if you made something playable, and had fun making it, I think that's what counts most. :)