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diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/moving_enemy.gif renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/moving_enemy.gif b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/moving_enemy.gif renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/moving_enemy.gif
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/moving_ship.gif renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/moving_ship.gif b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/moving_ship.gif renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/moving_ship.gif
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player.png b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player.png
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player_full_settings.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player_full_settings.png b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player_full_settings.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player_full_settings.png
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player_value_tweak.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player_value_tweak.png b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/player_value_tweak.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/player_value_tweak.png
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/poulpi.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/poulpi.png b/‎tutorials/2d-game-unity/part-03-player-and-enemies/img/poulpi.png renamed to ‎tutorials/2d-game-unity/player-and-enemies/-img/poulpi.png
diff --git a/‎tutorials/2d-game-unity/part-03-player-and-enemies/index.md renamed to ‎tutorials/2d-game-unity/player-and-enemies/index.md
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diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/bang.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/bang.gif b/‎tutorials/2d-game-unity/part-04-shooting-1/img/bang.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/bang.gif
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/bang2.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/bang2.gif b/‎tutorials/2d-game-unity/part-04-shooting-1/img/bang2.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/bang2.gif
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/dnd_prefab.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/dnd_prefab.png b/‎tutorials/2d-game-unity/part-04-shooting-1/img/dnd_prefab.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/dnd_prefab.png
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/shooting.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shooting.gif b/‎tutorials/2d-game-unity/part-04-shooting-1/img/shooting.gif renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shooting.gif
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/shooting_rotation.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shooting_rotation.png b/‎tutorials/2d-game-unity/part-04-shooting-1/img/shooting_rotation.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shooting_rotation.png
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/shot.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shot.png b/‎tutorials/2d-game-unity/part-04-shooting-1/img/shot.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shot.png
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/img/shot_config1.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shot_config1.png b/‎tutorials/2d-game-unity/part-04-shooting-1/img/shot_config1.png renamed to ‎tutorials/2d-game-unity/shooting-1/-img/shot_config1.png
diff --git a/‎tutorials/2d-game-unity/part-04-shooting-1/index.md renamed to ‎tutorials/2d-game-unity/shooting-1/index.md
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diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/enemy_config.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/enemy_config.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/enemy_config.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/enemy_config.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/enemy_full_config.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/enemy_full_config.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/enemy_full_config.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/enemy_full_config.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/gizmo.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/gizmo.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/gizmo.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/gizmo.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/player_die.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/player_die.gif b/‎tutorials/2d-game-unity/part-05-shooting-2/img/player_die.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/player_die.gif
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/player_no_enemy.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/player_no_enemy.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/player_no_enemy.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/player_no_enemy.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/result.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/result.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/result.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/result.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_ok.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_ok.gif b/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_ok.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_ok.gif
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_right.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_right.gif b/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_right.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_right.gif
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_two_dir.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_two_dir.gif b/‎tutorials/2d-game-unity/part-05-shooting-2/img/shoot_two_dir.gif renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shoot_two_dir.gif
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/shot_config2.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shot_config2.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/shot_config2.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shot_config2.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/img/shot_poulpi.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shot_poulpi.png b/‎tutorials/2d-game-unity/part-05-shooting-2/img/shot_poulpi.png renamed to ‎tutorials/2d-game-unity/shooting-2/-img/shot_poulpi.png
diff --git a/‎tutorials/2d-game-unity/part-05-shooting-2/index.md renamed to ‎tutorials/2d-game-unity/shooting-2/index.md
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diff --git a/‎tutorials/2d-game-unity/part-08-sounds/img/3dsound.png renamed to ‎tutorials/2d-game-unity/sounds/-img/3dsound.png b/‎tutorials/2d-game-unity/part-08-sounds/img/3dsound.png renamed to ‎tutorials/2d-game-unity/sounds/-img/3dsound.png
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/img/music.png renamed to ‎tutorials/2d-game-unity/sounds/-img/music.png b/‎tutorials/2d-game-unity/part-08-sounds/img/music.png renamed to ‎tutorials/2d-game-unity/sounds/-img/music.png
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/img/sound_script.png renamed to ‎tutorials/2d-game-unity/sounds/-img/sound_script.png b/‎tutorials/2d-game-unity/part-08-sounds/img/sound_script.png renamed to ‎tutorials/2d-game-unity/sounds/-img/sound_script.png
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_explosion.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/explosion.wav b/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_explosion.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/explosion.wav
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_shot_enemy.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/shot_enemy.wav b/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_shot_enemy.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/shot_enemy.wav
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_shot_player.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/shot_player.wav b/‎tutorials/2d-game-unity/part-08-sounds/sounds/sound_shot_player.wav renamed to ‎tutorials/2d-game-unity/sounds/-sounds/shot_player.wav
diff --git a/‎tutorials/2d-game-unity/part-08-sounds/index.md renamed to ‎tutorials/2d-game-unity/sounds/index.md
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diff --git a/‎tutorials/2d-game-unity/tweaking-the-gameplay/index.md
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