Big fan of the central submarine mechanic. Having to take a vehicle with you has great potential for puzzles and platformig sections. This game focused more on the timer and horror aspect, which was also very interesting! I think it wears the Iron Lung inspiration on it's sleeve, but that's not a bad thing at all. Only thing that is a little unintuitive would be that, even when the sub's air supply is getting drained, your lungs start going empty. I understand that it raises the tension, but you'd think that the sub would help you breathe underwater haha😅
I do think that the sound design is actually quite eery lmao, good job on building a horror atmosphere within like.. 5 minutes of gameplay! Really nice entry!!