Hi PixelKun
I can't read this language so I can't help you. What does it say?
Modu Beats doesn't have an installer/installation. It's a simple zip file that you extract into a folder, and inside it is the game's executable which starts the game immediately. It's similar way to many/most games here on itch.io
Ok so it seems like your browser has extra security against downloading and running things from the internet.
You could try to override it, but there's a second option. Now there's a version that is playable directly from the browser so you can play that without downloading anything:
https://www.newgrounds.com/portal/view/738960
