Do I know how to make one? Of course I do, I have done it before for my Patrons when I was having technical issues with my Internet. I did not release that update here because by the time it was released the tech issue was resolved and I had made some changes to the code. But back to why I don't release update only... it takes more time to create and test than I have allocated for my workflow and schedule. If the download size is a concern I always link to the compressed version of the game that the amazing
compressors of the F95 community set up for each and every update, normally within a couple of hours of release. The current size of the compressed version is under 1.5 gb.
Now, as for possibly doing update only patches in the future... I am not against the idea completely. It would delay my release schedule though, due to my already tight schedule outside of development of the game. I would have to fit in creating the file, which in itself does not take too long, but then I would have to play test it several times to make sure there are no issues with the update patch, and that is the time consuming part. There could be delays of 1-2 weeks, more if there are any coding issues. So until I have time to dedicate to this, please look to the compressed version, it is the same game just highly compressed.