Restore intro screen and visible crater test behavior

src/main/java/com/vinlanx/explosionoverhaul/client/FirstTimeSetupHandler.java

@@ -22,6 +22,18 @@ public class FirstTimeSetupHandler {
 
     @SubscribeEvent
     public static void onClientTick(ClientTickEvent.Post event) {
+        Minecraft mc = Minecraft.getInstance();
+        if (!hasChecked && mc.screen instanceof TitleScreen) {
+            hasChecked = true;
+            if (Config.isFirstLaunch()) {
+                pendingShowIntro = true;
+            }
+        }
+        if (pendingShowIntro && mc.screen instanceof TitleScreen) {
+            pendingShowIntro = false;
+            mc.setScreen(new IntroSplashScreen());
+            Config.markFirstLaunchComplete();
+        }
     }
 
     static {

src/main/java/com/vinlanx/explosionoverhaul/client/IntroSplashScreen.java

@@ -6,11 +6,27 @@ import net.minecraft.network.chat.Component;
 
 public class IntroSplashScreen extends Screen {
     public IntroSplashScreen() {
-        super(Component.empty());
+        super(Component.literal("Explosion Overhaul"));
     }
 
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTick) {
+        this.renderBackground(graphics, mouseX, mouseY, partialTick);
+        graphics.drawCenteredString(this.font, Component.literal("Explosion Overhaul"), this.width / 2, this.height / 2 - 32, 0xFFFFFF);
+        graphics.drawCenteredString(this.font, Component.literal("NeoForge 1.21.1 private test port"), this.width / 2, this.height / 2 - 10, 0xD0D0D0);
+        graphics.drawCenteredString(this.font, Component.literal("Click or press any key to continue"), this.width / 2, this.height / 2 + 16, 0xA0A0A0);
         super.render(graphics, mouseX, mouseY, partialTick);
     }
+
+    @Override
+    public boolean keyPressed(int keyCode, int scanCode, int modifiers) {
+        this.onClose();
+        return true;
+    }
+
+    @Override
+    public boolean mouseClicked(double mouseX, double mouseY, int button) {
+        this.onClose();
+        return true;
+    }
 }