diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 09a4488..5f5daa5 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -5,12 +5,12 @@ plugins {
 
 android {
     namespace = "io.github.sky130.kndroidx.demo"
-    compileSdk = 33
+    compileSdk = 34
 
     defaultConfig {
         applicationId = "io.github.sky130.kndroidx.demo"
         minSdk = 21
-        targetSdk = 33
+        targetSdk = 34
         versionCode = 1
         versionName = "1.0"
 
diff --git a/app/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt b/app/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt
deleted file mode 100644
index fee3be2..0000000
--- a/app/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-package io.github.sky130.kndroidx
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("io.github.sky130.kndroidx", appContext.packageName)
-    }
-}
\ No newline at end of file
diff --git a/app/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt b/app/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt
deleted file mode 100644
index 71f2269..0000000
--- a/app/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package io.github.sky130.kndroidx
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}
\ No newline at end of file
diff --git a/core/src/main/java/kndroidx/extension/LogExtraFun.kt b/core/src/main/java/kndroidx/extension/LogExtraFun.kt
index 44238e3..3f92a32 100644
--- a/core/src/main/java/kndroidx/extension/LogExtraFun.kt
+++ b/core/src/main/java/kndroidx/extension/LogExtraFun.kt
@@ -12,7 +12,7 @@ val Any.log: LogObject
 fun Any.log(tag: String = TAG) = LogObject.getObj(tag, this.toString())
 
 fun isDebug(): Boolean {
-    return context!!.applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE != 0
+    return context.applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE != 0
 }
 
 class LogObject private constructor(private val tag: String, private val msg: String) {
diff --git a/kndroidx/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt b/kndroidx/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt
deleted file mode 100644
index fee3be2..0000000
--- a/kndroidx/src/androidTest/java/io/github/sky130/kndroidx/ExampleInstrumentedTest.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-package io.github.sky130.kndroidx
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("io.github.sky130.kndroidx", appContext.packageName)
-    }
-}
\ No newline at end of file
diff --git a/kndroidx/src/main/java/kndroidx/extension/IntentExtraFun.kt b/kndroidx/src/main/java/kndroidx/extension/IntentExtraFun.kt
deleted file mode 100644
index d51926f..0000000
--- a/kndroidx/src/main/java/kndroidx/extension/IntentExtraFun.kt
+++ /dev/null
@@ -1,51 +0,0 @@
-package kndroidx.extension
-
-import android.app.Activity
-import android.app.Application
-import android.app.Service
-import android.content.ComponentName
-import android.content.Context
-import android.content.Intent
-import android.content.ServiceConnection
-import android.os.IBinder
-import kndroidx.application.ApplicationX
-
-inline fun Context.startIntent(block: Intent.() -> Unit) : Intent {
-    val intent = Intent()
-    intent.block()
-    startActivity(intent)
-    return intent
-}
-
-inline fun <reified T : Activity> Context.start() {
-    val intent = Intent(this, T::class.java)
-    startActivity(intent)
-}
-
-inline fun <reified T : Activity> Context.start(block: Intent.() -> Unit) {
-    val intent = Intent(this, T::class.java)
-    intent.block()
-    startActivity(intent)
-}
-
-inline fun <reified T : Service> start(
-    flags: Int = Application.BIND_AUTO_CREATE,
-    context: Context = ApplicationX.application,
-    crossinline onServiceConnected: (ComponentName, IBinder) -> Unit = { _, _ -> },
-    crossinline onServiceDisconnected: (ComponentName) -> Unit = { _ -> },
-    intent: Intent.() -> Unit = {},
-) : Intent {
-    val service = Intent(context, T::class.java)
-    val serviceConnection = object : ServiceConnection {
-        override fun onServiceConnected(name: ComponentName, binder: IBinder) {
-            onServiceConnected(name, binder)
-        }
-
-        override fun onServiceDisconnected(name: ComponentName) {
-            onServiceDisconnected(name)
-        }
-    }
-    service.intent()
-    context.bindService(service, serviceConnection, flags)
-    return service
-}
\ No newline at end of file
diff --git a/kndroidx/src/main/res/values/colors.xml b/kndroidx/src/main/res/values/colors.xml
deleted file mode 100644
index f8c6127..0000000
--- a/kndroidx/src/main/res/values/colors.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="purple_200">#FFBB86FC</color>
-    <color name="purple_500">#FF6200EE</color>
-    <color name="purple_700">#FF3700B3</color>
-    <color name="teal_200">#FF03DAC5</color>
-    <color name="teal_700">#FF018786</color>
-    <color name="black">#FF000000</color>
-    <color name="white">#FFFFFFFF</color>
-</resources>
\ No newline at end of file
diff --git a/kndroidx/src/main/res/values/strings.xml b/kndroidx/src/main/res/values/strings.xml
deleted file mode 100644
index c137e5b..0000000
--- a/kndroidx/src/main/res/values/strings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">KndroidX</string>
-</resources>
\ No newline at end of file
diff --git a/kndroidx/src/main/res/values/themes.xml b/kndroidx/src/main/res/values/themes.xml
deleted file mode 100644
index d9b1744..0000000
--- a/kndroidx/src/main/res/values/themes.xml
+++ /dev/null
@@ -1,16 +0,0 @@
-<resources xmlns:tools="http://schemas.android.com/tools">
-    <!-- Base application theme. -->
-    <style name="Theme.KndroidX" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
-        <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryVariant">@color/purple_700</item>
-        <item name="colorOnPrimary">@color/white</item>
-        <!-- Secondary brand color. -->
-        <item name="colorSecondary">@color/teal_200</item>
-        <item name="colorSecondaryVariant">@color/teal_700</item>
-        <item name="colorOnSecondary">@color/black</item>
-        <!-- Status bar color. -->
-        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
-        <!-- Customize your theme here. -->
-    </style>
-</resources>
\ No newline at end of file
diff --git a/kndroidx/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt b/kndroidx/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt
deleted file mode 100644
index 71f2269..0000000
--- a/kndroidx/src/test/java/io/github/sky130/kndroidx/ExampleUnitTest.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package io.github.sky130.kndroidx
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}
\ No newline at end of file