Updated 0.6.0 Release Date

You're doing great on the development. I think we all appreciate the updates, especially during this troubled period. Take your time and we'll be here!

Sorry to hear you're having issues with things. But if it is of any help, this is how I'd go about making a highlight shader in Unity (if you need any details feel free to email me or something, I could provide a file with it or give further instructions, I'm a rather amateurish Technical Artist in the grand scheme of things, but even I can manage something like this no problem); First, create a layer where you put the buttons, or a copy of what you want to highlight alone in your scene, then make a render texture of the objects over a black background (Unity has documentation on how to perform that, it's the method used for mirrors and such, basically it projects the content of a camera in your scene into a cached Texture to be used within a shader, just look up 'Render Texture' on Unity's official doc, and do it with your buttons isolated in their own layer, then cull anything unnecessary from the scene using the tag system, this way it's just the buttons themselves over black). Once this is done, you can bring that Render Texture into a shader or shadergraph, make it on a black background of course (use camera culling to disregard anything in the scene BUT the layer your interactive buttons would be located), then use sampling and a matrix inside the shader to create an edge detection filter using a Sobel operator (basically a blur of the image, sampling each pixel on the sides of the objects you want to highlight X number of times in each direction, you can find more info on that by looking up how matrices and sobel operators work), once that's done, saturate your base sample to a value of 1 (Multiply, then clamp), as to make the original objects completely white, then, subtract that from your newly created Sobel edge detection, then saturate it white as well, before giving it any color you want. In order what it would do is; 1. Make a copy of the camera's image (using a specialized layer and a render texture) 2. In the shader itself, paste (texture sample) it X times up, down, left, and right, 'enlarging' it on all of its sides by smear, using a matrix then, add all of the samples then divide by the number of samples added (You can check a tutorial on how to create a blur in unity, it's the exact same principle). 3. Make the original sample completely white (multiply it by a large number then Max/Clamp it to keep it at 1). 4. Subtract that white original from the smear to punch a 'hole' in that smear. 5. Make the smear white as well afterward (same as before, multiply then camp, since you subtracted the original from the samples it should be at 0, so multiplying it with anything would still leave it at 0). 6. Color it (multiply by any vector3). 7. ??? 8. Profit. All of this of course in a post-process shader. Another, much simpler and less shader intensive solution, would be to simply isolate the objects you want to highlight from the rest of your scene, paint them white, scale them up, and paste them as their own sprite/objects behind the originals in your scene as children, only making them appear whenever you hover on them, aka the inverted shell method, it's a bit less GPU intensive but increase the size of your file accordingly (since you're doubling up on the amount of sprites for your interactives), and needs manual manipulation in an art software. Both those methods work in both 2D and 3D environments by the way, the sampler method using sobel edge detection can work screenwide, the inverted shell method is applicable to 3D models as well, would you need this as an option. I hope I gave a clear enough explanation, but it's totally doable in a timely manner.

Can't wait marking my calendar now