it took 7 seconds to show splash screen on sn8950 and 7950x3d and 64gd ddr6 6400mhz system.
I think that either your start up scene or maybe your auto loads have too many load() or too many references...
Or you are using preload() in your startup code too much
I don't know if you reqlised it but your font has some weird anti ailising or something
Look at the sides of P I and N, is there a way to make it all sharp and the same color? like why dim-bright-dim over 3 pixels and not just bright-bright over 2 pixels? I assume you are using a "pixel" .ttf and it is using variable spacing and being pushed to a sub pixel location. Don't know how to fix that but maybe there is an option or some way to pixel align each glyph?
Main menu music should be set to loop. instead of plays out and stops.
your art screen should have a grid of icon buttons with the image shown at small scale, then on press it pops the full size, another click and it disappears and goes back to the button grid.
that can be done with a node layout very similar to the scroll but it would be better UI just need the onclick signals and the popup.
models is cool. but should have something on screen saying what to press to change them and also the sky box looks bad. if you need the sky box for ambient lighting on the models then you can probably still do that just have a billboard sprite3d behind them that rotates with the camera with a set offset and it can have some cool dark techno background shader or something. but even just pitch black would be nicer than default skybox.
it wont let me choose the construct, imsim, zanzibar, or earthQuake. the buttons just ignore any click