diff --git a/assets/Sounds/EchoSonar/EchoSonar.mp3 b/assets/Sounds/EchoSonar/EchoSonar.mp3
new file mode 100644
index 0000000..a095485
Binary files /dev/null and b/assets/Sounds/EchoSonar/EchoSonar.mp3 differ
diff --git a/assets/Terrain/layers-tileset.png b/assets/Terrain/layers-tileset.png
index 2b90686..ce62b7a 100644
Binary files a/assets/Terrain/layers-tileset.png and b/assets/Terrain/layers-tileset.png differ