diff --git a/indigo/indigo/src/main/scala/indigo/package.scala b/indigo/indigo/src/main/scala/indigo/package.scala
index fedb609b4..60001bd10 100644
--- a/indigo/indigo/src/main/scala/indigo/package.scala
+++ b/indigo/indigo/src/main/scala/indigo/package.scala
@@ -159,6 +159,19 @@ object syntax:
 
 end syntax
 
+object mutable:
+
+  type CacheKey = shared.CacheKey
+  val CacheKey: shared.CacheKey.type = shared.CacheKey
+
+  type ToCacheKey[A] = shared.ToCacheKey[A]
+  val ToCacheKey: shared.ToCacheKey.type = shared.ToCacheKey
+
+  type QuickCache[A] = shared.QuickCache[A]
+  val QuickCache: shared.QuickCache.type = shared.QuickCache
+
+end mutable
+
 val logger: indigo.shared.IndigoLogger.type = indigo.shared.IndigoLogger
 
 type Startup[SuccessType] = shared.Startup[SuccessType]
diff --git a/indigo/indigo/src/main/scala/indigo/shared/QuickCache.scala b/indigo/indigo/src/main/scala/indigo/shared/QuickCache.scala
index db6d87c71..8463e3319 100644
--- a/indigo/indigo/src/main/scala/indigo/shared/QuickCache.scala
+++ b/indigo/indigo/src/main/scala/indigo/shared/QuickCache.scala
@@ -1,5 +1,14 @@
 package indigo.shared
 
+/** QuickCache is a handy way to avoid expensive re-calculation of data. It is a side-effecting arrangement that Indigo
+  * uses a lot internally, that can also be used by cautious game devs. Simple example:
+
+  ```
+  given QuickCache[MyExpensiveObject] = QuickCache.empty
+
+  QuickCache("key")(obj)
+  ```
+  */
 final class QuickCache[A](private val cache: scalajs.js.Dictionary[A]):
 
   def fetch(key: CacheKey): Option[A] =