Loving the atmosphere! Nice blend of horror/mystery combined with exploration. Needless to say it needs an art pass. Didn't have technical any issues, ran great on default settings.
Some feedback.
1. Jumping feels inconsistent at times. Feels like there's too much drag and you lose most of your velocity once you're in the air making jumps hard to calculate. Might be an air control issue.
2. I would like to see some kind of health indicator. Like changing the glowing color of the tail.
3. When throwing a spear I would like it to switch to the next item automatically.
4. Even when my inventory was full I could still spawn spears from the sea urchins, I don't know if this is intended.
Keep up the good work!