That’s strange :o It sounds like a bug that happened for some people with one of the much older versions of the game >.< It was an issue caused by certain PCs being unable to load video files (as the title screen used to feature a video background.)
I fixed that a long time ago though by replacing the video file with regular png image files and animating them in-engine.
Which version was it that you downloaded?
For reference, the most recent one that is recommended to download is the file called (depending on your OS):
Darling Duality - Demo - (Windows)
Darling Duality - Demo - (Mac)
Darling Duality - Demo - (Linux)
Any of the other files are old and outdated versions that are only there for posterity so that people can see how the game has changed over time if they want to. The full game isn’t out yet and won’t be for a long time :3
Thanks for your interest in the project. If you still have the problem, I’m not entirely sure what would fix it >.< but I can look into it when I’m actively working on the project again to try and make sure that it’s fixed for you when the full game is released eventually :3
Oh, and your English is great :D