I really enjoyed this game, and it is some of the most fun I've had playing games in this jam. The grinding is addicting and atmosphere is really immersive. One pretty large issue I encountered is that the maxed out sonar stops working, leaving you blind mostly. My guess is that it's due to some entity/gameobject limit causing new sonar dots to not be spawned. I would also love a little more feedback in terms of combat because it was hard to tell if my shots hit at times. Finally, I was unsure how the oxygen mechanic worked or if it had been implemented fully because I didn't die when it ran out or anything like that. Moving past that, I have a lot positive to say. The music was perfect for this game and really captured the vibes of it well. Your use of the themes was really enjoyable and an integral part of your game. The size of your upgrade tree was nice because it gave me a lot to grind for. The boss at the end was very impressive, my mouth quite literally dropped when it starting throwing it's crazy attack at me. Great job!