Cool vibes. Super hard, but instant restart & back-in-the-game flow makes it easy to keep trying over & over! My small bit of feedback-criticism maybe kind of clashes with others, but I would actually reduce the time it takes to reach the first obstacles (move the player closer at the start) because those precious… 3? seconds can feel long if you try a lot (and fail a lot, like me, hah) - perhaps not for the very first time you play though, if you wanna get fancy with it :)
I had the most trouble with the jumps, always find it hard to do first-person platforming in games.
Good job!