WHY APPLE WHYYYYYY!!!?!??!

Okay so, I love this app it is really easy to use! I have used it for editing videos all the time... on my phone though. I downloaded itunes on my Surface pro 4 and spent 30 minutes trying to download iMovie. I finally get it and what do you know? The app isnt compatable with my computer. All Im asking is... WHY CANT YOU MAKE THIS APP A WINDOWS DOWNLOAD!!!! I NEEEED THIS EDITING SOFTWARE FOR AN ANIMATION!!!!!!!!

Intfam about iMovie, v2.2.3