Great art and background music. Intuitive gameplay mechanics. So, congratulations on your first jam participation: this game is well-made. I mean the technical part. Finishing a game for jam is a difficult challenge.
The weakest point: the lack of reward. This ruins the fun factor. Even a modest speed meter makes the games less pointless. But the best reward is progression. For example, an additional ability, a new weapon, or skill upgrades. Unfortunately, I quit playing right at the start because I couldn't get past the parkour. I've hated parkour ever since it appeared in Minecraft minigames. I also don't feel any feedback due to the lack of sounds and other effects.
I hope this helps you grow. My games aren't fun either; game design is hard.