29 MB between 1,44 HD floppy disk...like 20,13 disks! But with some compression It will occupy between 15 and 20 disks...(Insert Disk 17, please).
Unity adds a lot of overhead. Looking at the graphics, this game probably would've come out to a handful of disks at the most, if it was actually made in the 90's. They would've used C, wrote their own engine specifically for the target platform, and the graphics would've been stored as paletted indexed formats instead of RGB (so, for a 16 colour game, 1/2 a byte per pixel, instead of 3 bytes per pixel).
I say a handful of disks, because games like Monkey Island came on a couple of disks, but this game has much larger sprites than those games did on average!
Oh yes I read about the original Kings Quest games, they did store the art as vectors, because they had to, it was the only way to fit it in RAM on the Apple computer. But Monkey Island etc. the ones your game looks like, they stored them as proper bitmaps.
Yes I completely skipped over mentioning the music :) Just plain note data...
@pixelartsierra has a bunch of gifs showing how the engine paints the backgrounds. Pretty amazing
https://twitter.com/PixelArtSierra/status/1622626172868722692?t=HOpy7xpGBbOzW0r6...