Hello developers, my game has a file size of about 5.2 megabytes (which from readings of other posts seems small), yet still takes a long time to load in studio testing, at about 20 seconds of load screen and 10 seconds of intense lag.
I think the problem is in my plane of terrain water that is about 16,000 studs in length and width and 15 studs in thickness.
I removed all of the terrain, and replaced it with a grid of 2024 by 2024 parts that look the same but cause no lag. Game begins in about 4 seconds with new setup.