2D graphic problem with tilemap and resolution

I started using unity a few days ago with the intend to learn and make a somewhat simple 2D clicker and management game, inspired by a android game named ''factory inc''.

I'll get straight to the point, i'm trying to make this cartoon-ish sprite graphics, basically the same artstyle as the game mentioned before, i thought that tilemaps would be the best way to design the levels, but, when i test it, the art that i did get smashed to bits, literally.

I made a sprite in 512x512 format, when i put in the editor is all ok, looks fine, but when i test its resolution changes to a lot smaller.

I connected the canvas to the camera, made the reference resolution to 1600x900, the tilemaps is in the 1 scale, turned the filter to Point, compression to none and pixels per unit to 512, none made it work,

I've been searching for a week trying to find a solution before trying to ask here, but got nothing, if someone knows what could be the cause that would be a great help. Thanks in advance.