Great job! I didn't imagine an endless runner with a cosmic horror theme. Art is really good in your character, enemies and background. The beginning cutscene adds a lot to the experience. The music fits really well for a frenetic game. The camera movements were a nice feature, I felt prepared for something bigger to come.
It's important to keep the communication with the player, I wasn't able to know why did I lose, be careful with that. It could be useful for your player animation to move the whole body, not only the legs. Try to add more sounds, they make a real difference in the experience.
This was a good entry for the jam and a nice concept. You can add more things in the future and create an addictive game.