I’ve downloaded the game file but it won’t launch on my laptop am I missing something or did I download wrong one?

If it's a windows laptop, you download the "Renryuu Ascension 24.10.23 [Windows Version].zip" file and use winrar or a similar programm to unpack the .zip. In the folder is a "Game.exe" which you can interact with to start the game.

what if it’s a Chromebook I don’t know if that’s windows or something else