Very nice visual design and sound atmosphere. And fun to play, too. Great job.
How did you accomplish the 3D look?
Viewing post in HAVEN jam comments
The 3D effect is just from sprite stacks, where you draw sprites from bottom to top with Y offsets of -1 (or in my case -0.5, because it looked cooler). Additionally, you can adjust the lighting of each layer as you go, which will give a good 3D effect (I only used it for the player, really -- you can hit 'n' in-game to toggle it for everything to use). I used https://github.com/DarkDes/AsepriteSpriteStackEd with Aseprite to help with this, though I had to modify it to allow floating point layer offsets.