The game loads game assets into memory (the web versions download these from a CDN, the windows versions load them from the an archive in the game’s files). Processing and loading these files takes some time. If the time it takes is longer than the transition period between game screens (about 50ms) then a load screen is generated. After the load screen is generated, once the files finish loading, a button you can click to continue is added to the screen. It’s sometimes the case that the assets take longer than 50ms but not that much longer, maybe only 100ms or something. If this happens, it can sometimes appear that the button is there from the start. Maybe I’ll adjust this in the future, but it’s totally harmless.