Game poorly optimized for android

Hi, I'm making a really simple android game, with a map made in Blender with so less triangles you can count them. On PC it works fine (160+ fps) but on android it floats around 15/20, wich is terrible, considering how simple that game is. I ran the Profiler and most of the time is caused by rendering. At first I tought it was a vsync problem, but it wasn't. Then I tought it was a shader problem, because all of my materials were set to "Standard", so I changed it to "Mobile/Diffuse", leaving it white. But it still didn't do any difference.
Here is a screenshot fo the profiler: https://imgur.com/a/bSAnmEu
So in this game I have: a boat wich moves around and shoots projectiles, those projectiles get destroyed when they hit a collider (using Raycasts). Then I have another boat wich is an enemy.
Here is another screenshot of the "very mmersive gameplay: https://imgur.com/a/nvoU4ko , to make you know how it looks like
I'm pretty desperate, actually.

 

How many batches does it render per frame? You'll probably need to decrease that. Another common issue on mobile is overdraw, but from the screenshot that is not the first thing I'd consider.

 

Is your environment set to static? I've noticed that setting items to static as well as using dynamic batching in my player settings helped quite a lot for me

 

It should tell you right there. Click on CPU Usage and look at your rendering and scripts.

 

What's the mobile device you're testing the game on?