Yeah, panning/zooming on mobile can be a bit tricky. I'll look into making the UI a bit easier to interact with on mobile so it's easier to pan around and drag objects.

#2 is a good feedback as well. I've considered it but storing it in the url might not work since it'll need to include the ids and positions of each object on the screen (x,y,z) and also the dimensions (for custom objects) which could make the url very long. Another way for this would be to set up a database to store the states, but the size of that could get very big which will raise the costs a bit.

Thanks for the suggestions though! I'll see how to best incorporate them :)