Thanks! Glad you enjoyed it!
The abrupt jump is the #1 feedback I'm getting, so I already improved it in the post-jam build. I'm also considering adding a way to aim up. I'm still on the fence about exempting the player from their own explosions, but I will continue to think about it ;)
The grey wall is supposed to represent the hatch used by the submarines and divers to leave the station. It's not hiding anything, I just didn't have time to create unique tiles for it :p