Hi Samah,
What is currently the issue with the game? Is it crashing, not starting? or is it that you can't install it? Just need a little more information as to what is happening with your game. I use Windows 10 x64 as well and don't really have any issues playing it.
If it's that you can't Install it, use @le717's alternative installer: https://github.com/le717/LEGOLAND-Alternate-Installer/releases
Have you tried any of the compatibilty modes for Windows XP or older? If you are unsure what this is: right click on the LegoLand EXE file (found in the folder you installed the game to), then go to 'Properties', then the 'Compatibility' tab. Select an older Windows system and perhap enable "Reduced Color Mode"... setting it to 16bit.