I mean that's fair. I have no idea how big the game actually is, if it can even be compressed to under 2gb
The game is currently about 30,000 renders and roughly 30 hours of content, with 60 more chapters to come. It's just big.
How big would the game be if the files weren't conpressed?
If they were still raw PNGs, the game would be probably 5-7 times as large as it is now.