Hi, I plan to participate to the Github annual Game Jam, and with my team we want to try Kotlin multi-platform to make the game running on Android, iOS and Web. I'm a bit lost about the way to create and configure the project into intellij, betweens Multiplatform library or mobile Android/iOS. The first is just a shared library and the other seems to generate the project for android and ios (very nice, but can I add web too ?)

Yes, just add a js target in your build script as per the docs

Ok so I can start with the mobile Android/iOS template then add js target.