Seems like a fun idea; you've clearly got some things set up, but unfortunately it's really impossible to finish the game as you get killed within a minute. Once you hear the 'roar' sound it's basically over. You can only run for so long before the oxygen bar hits zero and if you take a second to recharge you get killed again. I found the item recipes in the pause menu but they don't really make a difference whatsoever in helping you go further.
I'm genuinely looking forward to this game and I hope you're able to fix a few things. I think it could be a really fun game to play, even played as speedrun. I would add a currency like system where you can upgrade certain things from a shop as you progress.
I know this is made for a jam and plan to polish it afterward, but for now I'd really fix that issue where you get killed so quickly in the beginning of the game. The more people that test your game the better, you'll get more opinions that you can choose from on what's right and wrong and find a middle ground.
Thanks for sharing it! Best of luck! ❤️