As I usually do when I leave feedback, I'm going to start with three critiques:
1) There wasn't a lot of variety in the different hazards. Yeah they all looked different, but in reality, they were all just static objects. I think moving obstacles or other dynamic hazards would've made the game more interesting.
2) I also had a couple issues with the player controller. Especially when I was turning, I literally couldn't see where I was going at all and just had to pray. Also, if you want the game to be more fun to speedrun, I feel like the player controller should be generally quicker. It's hard to explain what I mean super well, but just in general, having it move faster and then be more responsive when turning. Adding on to this, I also feel like there needs to be some kind of unique mechanic that makes the game really stand out.
3) Having only one long level when there was clear separation between sections felt like a weird decision to me. I think splitting the sections into different levels would give you more room to make difficult and interesting levels without worrying about sending the player all the way back to the beginning, and then, for the speedrunning aspect, you could've done some sort of 3 star system (the webslinger game did this very well). It was just a little weird to have to redo everything, and then after the first level, it never really got harder.
In general though, you guys did a really good job. The 3D models genuinely looked really good, and, at least when I was playing, there didn't appear to be any game-breaking bugs or anything. Especially since you mentioned it was your first game jam, really good job!