Thanks for trying it out and for giving such detailed feedback! I just updated the game and the net bug, starting ingredient, and edge placements should be fixed. I also made it possible to place ingredients at the edge when clicking outside the boundaries of the pot.
I adjusted the physics and the hitboxes too, but I think it's still a work in progress (the shrimp is still weird). OG Suika has a lot of complexities in the physics, and I'm not sure if Godot's default physics engine is up to the job. I'll take another look at it when I have a free weekend.