I imagine you didn't design the game to win the jam... because this is not going to win the jam.

Other commenter had it right. Generally good to err on the side of letting people complete a game fairly easily in a game jam. There's also a reason why there aren't many well regarded first person platformers out there, it takes a lot to make them enjoyable. Might have gone further but I had to alt+f4 before the music drove me insane.

I feel like there's a fine line between making a challenging game and making a game that's frustrating. Unfortunately, this game felt more frustrating than challenging. It's hard to scope out how far the player can jump, as well as the platforms being extremely tiny compared to the player. I think with some playtesting and fine tuning, the game can be made so that it becomes challenging.