Now it would likely be able to do it in nanite, not sure if it handles alphas yet, but it can be used for vegetation since 5.1. but its a lot of very simple geometry some flat facing the camera some not with pixel depth offset to blend it in.
I worked on the UVs, to align every UV vertex with the pixels, I also worked a bit on the textures, blocked the base color and worked a bit more in some props.
The model doesn't have enough vertices to support that detail. You will need a massive amount of subdivision to support that kind of detail. Basically, a vertex for every pixel of the original texture.
Congrats! looking really good, on top of what other people have mentioned I think the logo dosnt match the style of the game at all, why not make it pixelated?
If you need the tool to honor transparent pixels in a transparent PNG or GIF, Foreground Reference Utility doesn't seem to do it, but I found one that does: http://customdesktoplogo.wikidot.com/