Added a horsey button to the main menu. Now you can see if the mod is working :D

src/main/java/com/minelittlepony/client/FabMod.java

@@ -3,8 +3,17 @@ package com.minelittlepony.client;
 import net.fabricmc.api.ClientModInitializer;
 import net.fabricmc.fabric.api.event.client.ClientTickCallback;
 import net.fabricmc.loader.api.FabricLoader;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.screen.TitleScreen;
+import net.minecraft.util.Identifier;
 
+import com.minelittlepony.client.gui.GuiPonySettings;
 import com.minelittlepony.client.hdskins.IndirectHDSkins;
+import com.minelittlepony.common.client.gui.element.Button;
+import com.minelittlepony.common.client.gui.sprite.TextureSprite;
+import com.minelittlepony.common.client.gui.style.Style;
+import com.minelittlepony.common.event.ScreenInitCallback;
 
 public class FabMod implements ClientModInitializer {
 
@@ -14,9 +23,26 @@ public class FabMod implements ClientModInitializer {
         ClientReadyCallback.Handler.register();
         ClientTickCallback.EVENT.register(mlp::onTick);
         ClientReadyCallback.EVENT.register(mlp::postInit);
+        ScreenInitCallback.EVENT.register(this::onScreenInit);
 
         if (FabricLoader.getInstance().isModLoaded("hdskins")) {
             IndirectHDSkins.initialize();
         }
     }
+
+    private void onScreenInit(Screen screen, ScreenInitCallback.ButtonList buttons) {
+        if (screen instanceof TitleScreen) {
+            int y = FabricLoader.getInstance().isModLoaded("hdskins") ? 80 : 50;
+
+            buttons.add(new Button(screen.width - 50, screen.height - y, 20, 20).onClick(sender -> {
+                MinecraftClient.getInstance().openScreen(new GuiPonySettings());
+            }).setStyle(new Style()
+                    .setIcon(new TextureSprite()
+                    .setPosition(2, 2)
+                    .setTexture(new Identifier("minelittlepony", "textures/gui/pony.png"))
+                    .setTextureSize(16, 16)
+                    .setSize(16, 16))
+            ));
+        }
+    }
 }