I played Bayonetta for the first time a few months ago on my steam deck, and during loading times you were able to practice combos and stuff. Unfortunately it only lasted for a split second since it loads so fast from the SSD, I'm guessing it's original release on console disc allowed players a bit more time to try it while it was loading from the disc.
<https://en.wikipedia.org/w/index.php?title=Fast_loader&oldid...>
You might be made permanently destitute and homeless however.
As it stands, IPR works enough that patent trolls are angry that it's too easy to get junk patents thrown out. But it still requires you to know in advance what to fight, to spend money on lawyers fighting it, and to delay actually using the invention you think isn't patented until the patent is actually thrown out. Some developer who independently invents loading screen mini-games probably isn't going to even know about the loading screen games patent until either legal tells them to remove the mini-game or they launch and get sued by Namco.
An example of this: do you remember VRML chatrooms? Worlds, Inc was one of them, and they got US8082501B2[1], a patent on having a character in a multiplayer virtual world. They sued Activision[2] over the span of nine years, while also hitting up other game developers for money, including Microsoft[3]. Microsoft actually tried filing an IPR case[4], but the courts acted first to invalidate the patent before the IPR could go through[5].
[0] https://www.uspto.gov/patents/ptab/trials/inter-partes-revie...
[1] https://patents.google.com/patent/US8082501B2
[2] https://www.gamesindustry.biz/activision-blizzard-sued-for-p...
[3] https://portal.unifiedpatents.com/litigation/Texas%20Western...
[4] https://portal.unifiedpatents.com/ptab/case/IPR2021-00277
[5] https://s3-us-west-1.amazonaws.com/ptab-filings%2FIPR2021-00...
As if making something buzz is fucking "non-obvious"