diff --git a/annotations/src/main/java/mindustry/annotations/impl/AssetsProcess.java b/annotations/src/main/java/mindustry/annotations/impl/AssetsProcess.java
index 0b5620c11d..1b0e006001 100644
--- a/annotations/src/main/java/mindustry/annotations/impl/AssetsProcess.java
+++ b/annotations/src/main/java/mindustry/annotations/impl/AssetsProcess.java
@@ -20,8 +20,8 @@ public class AssetsProcess extends BaseProcessor{
 
     @Override
     public void process(RoundEnvironment env) throws Exception{
-        processSounds("Sounds", rootDirectory + "/core/assets/sounds", "arc.audio.Sound");
-        processSounds("Musics", rootDirectory + "/core/assets/music", "arc.audio.Music");
+        processSounds("Sounds", rootDirectory + "/assets/sounds", "arc.audio.Sound");
+        processSounds("Musics", rootDirectory + "/assets/music", "arc.audio.Music");
         processUI(env.getElementsAnnotatedWith(StyleDefaults.class));
     }
 
@@ -33,11 +33,11 @@ public class AssetsProcess extends BaseProcessor{
         MethodSpec.Builder loadStyles = MethodSpec.methodBuilder("loadStyles").addModifiers(Modifier.PUBLIC, Modifier.STATIC);
         MethodSpec.Builder icload = MethodSpec.methodBuilder("load").addModifiers(Modifier.PUBLIC, Modifier.STATIC);
         CodeBlock.Builder ichinit = CodeBlock.builder();
-        String resources = rootDirectory + "/core/assets-raw/sprites/ui";
-        Jval icons = Jval.read(Fi.get(rootDirectory + "/core/assets-raw/fontgen/config.json").readString());
+        String resources = rootDirectory + "/assets-raw/sprites/ui";
+        Jval icons = Jval.read(Fi.get(rootDirectory + "/assets-raw/fontgen/config.json").readString());
 
         ObjectMap<String, String> texIcons = new OrderedMap<>();
-        PropertiesUtils.load(texIcons, Fi.get(rootDirectory + "/core/assets/icons/icons.properties").reader());
+        PropertiesUtils.load(texIcons, Fi.get(rootDirectory + "/assets/icons/icons.properties").reader());
 
         StringBuilder iconcAll = new StringBuilder();
 
diff --git a/build.gradle b/build.gradle
index 2e6b50b7dc..a3477e5f9e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,6 +23,11 @@ buildscript{
     }
 }
 
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.4.32'
+    id "org.jetbrains.kotlin.kapt" version "1.4.32"
+}
+
 allprojects{
     apply plugin: 'maven'
     
@@ -287,6 +292,16 @@ project(":ios"){
 
 project(":core"){
     apply plugin: "java-library"
+    apply plugin: "kotlin"
+    apply plugin: "kotlin-kapt"
+
+    kapt {
+        javacOptions {
+            option("-source", "14")
+            option("-target", "1.8")
+            option("--enable-preview")
+        }
+    }
 
     compileJava.options.fork = true
 
@@ -354,10 +369,9 @@ project(":core"){
         api "com.github.Anuken:rhino:$rhinoVersion"
         if(localArc() && debugged()) api arcModule("extensions:recorder")
 
-        compileOnly project(":annotations")
-        annotationProcessor project(":annotations")
         annotationProcessor 'com.github.Anuken:jabel:34e4c172e65b3928cd9eabe1993654ea79c409cd'
-
+        compileOnly project(":annotations")
+        kapt project(":annotations")
     }
 
     afterEvaluate{
diff --git a/gradle.properties b/gradle.properties
index 58e5ea67dc..bcc527779a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,9 @@
 org.gradle.daemon=true
 org.gradle.jvmargs=-Xms256m -Xmx1024m
 archash=0e99b0291f81d74d335dca8b0cf3bf26931f1197
+# Don't recompute annotations if sources haven't been changed
+kapt.incremantal.apt = true
+# Multithreaded
+kapt.use.worker.api=true
+# Compilation avoidance (see https://kotlinlang.org/docs/kapt.html#compile-avoidance-for-kapt-since-1-3-20)
+kapt.include.compile.classpath=false