chore[wip]: Update README

README.md

@@ -1,5 +1,6 @@
 Reveal effect (also known as coach mark, onboarding, tutorial, walkthrough, etc.) with a beautiful
-API for [Compose Multiplatform](https://www.jetbrains.com/lp/compose-multiplatform/).
+API for [Compose Multiplatform](https://www.jetbrains.com/lp/compose-multiplatform/) targeting
+Android, iOS, desktop and Web.
 
 ![Demonstration](./assets/demo.gif)
 
@@ -13,6 +14,16 @@ API for [Compose Multiplatform](https://www.jetbrains.com/lp/compose-multiplatfo
 
 ## Getting started
 
+### Compose Multiplatform
+
+As of version `3.0` Reveal is based on Compose Multiplatform targeting Android, iOS, desktop and
+Web. However please not that except Android the other platforms are currently not well tested and
+some of the targets are still alpha or experimental.
+
+When using Reveal on Android, please make sure that the version of Google's Jetpack Compose is
+compatible with the version of Compose Multiplatform that Reveal uses, which you can
+find [here](./gradle/libs.versions.toml#L5).
+
 ### Installation
 
 The minimum supported Android SDK is 21 (Android 5.0), which is a requirement of Jetpack Compose.