diff --git a/rs48/src/main.rs b/rs48/src/main.rs
index 79e4371..f450caf 100644
--- a/rs48/src/main.rs
+++ b/rs48/src/main.rs
@@ -12,10 +12,10 @@ pub enum ControllerParam {
 
 impl Display for ControllerParam {
 	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		f.write_str(match self {
-			&ControllerParam::Player => "player",
-			&ControllerParam::Random => "random",
-			&ControllerParam::Simulated => "simulated",
+		f.write_str(match *self {
+			ControllerParam::Player => "player",
+			ControllerParam::Random => "random",
+			ControllerParam::Simulated => "simulated",
 		})
 	}
 }
diff --git a/rs48_lib/src/game.rs b/rs48_lib/src/game.rs
index e417364..c797838 100644
--- a/rs48_lib/src/game.rs
+++ b/rs48_lib/src/game.rs
@@ -110,7 +110,7 @@ impl Game {
 		}
 		let potential_count = potentials.len() as f32;
 		if potential_count == 0. {
-			return Err(GameError::GridIsFull.into());
+			return Err(GameError::GridIsFull);
 		}
 		let random = rand::random::<f32>() * potential_count;
 		let index = random.floor() as usize;
@@ -160,7 +160,7 @@ impl Game {
 		direction: (isize, isize),
 		tile_pos: (usize, usize),
 	) -> usize {
-		if self.board.get(tile_pos.clone()).unwrap().is_empty() {
+		if self.board.get(tile_pos).unwrap().is_empty() {
 			0
 		} else {
 			let mut displacement = Displacement::new(&mut self.board, tile_pos, direction);
@@ -202,7 +202,7 @@ impl<'g> Displacement<'g> {
 	}
 
 	fn move_once(&mut self) -> bool {
-		let current_pos = self.position.clone();
+		let current_pos = self.position;
 		let current_value = self.grid.get_val(current_pos).unwrap();
 		if let Some(next_pos) = self.get_next_pos() {
 			match self.grid.get_val(next_pos) {
@@ -225,8 +225,8 @@ impl<'g> Displacement<'g> {
 	}
 
 	fn get_next_pos(&self) -> Option<(usize, usize)> {
-		let (current_x, current_y) = self.position.clone();
-		let (dx, dy) = self.direction.clone();
+		let (current_x, current_y) = self.position;
+		let (dx, dy) = self.direction;
 		if would_overflow(current_x, dx, self.grid.size() - 1)
 			|| would_overflow(current_y, dy, self.grid.size() - 1)
 		{
diff --git a/rs48_lib/src/grid.rs b/rs48_lib/src/grid.rs
index 53263bc..357b8e2 100644
--- a/rs48_lib/src/grid.rs
+++ b/rs48_lib/src/grid.rs
@@ -12,15 +12,11 @@ impl Tile {
 	}
 
 	pub fn value(&self) -> Option<usize> {
-		self.value.clone()
+		self.value
 	}
 
 	pub fn is_empty(&self) -> bool {
-		if let Some(_) = self.value {
-			false
-		} else {
-			true
-		}
+		self.value.is_none()
 	}
 }
 
@@ -90,7 +86,7 @@ impl Grid {
 	/// move a tile over another one, replace the previously occupied place by an empty tile and overrides the destination
 	///
 	pub fn move_tile(&mut self, (src_x, src_y): (usize, usize), (dst_x, dst_y): (usize, usize)) {
-		let src = self.tiles[src_y][src_x].clone();
+		let src = self.tiles[src_y][src_x];
 		self.tiles[dst_y][dst_x] = src;
 		self.tiles[src_y][src_x] = Tile::new_empty();
 	}
@@ -101,12 +97,11 @@ impl Grid {
 	pub fn biggest_value(&self) -> usize {
 		self.tiles()
 			.iter()
-			.map(|row| {
+			.filter_map(|row| {
 				row.iter()
 					.filter_map(|tile| tile.value())
 					.reduce(|a, b| a.max(b))
 			})
-			.filter_map(|value| value)
 			.reduce(|a, b| a.max(b))
 			.unwrap_or(0)
 	}
diff --git a/rs48_lib/src/grid_displayer.rs b/rs48_lib/src/grid_displayer.rs
index c944446..6540005 100644
--- a/rs48_lib/src/grid_displayer.rs
+++ b/rs48_lib/src/grid_displayer.rs
@@ -34,14 +34,13 @@ impl TileDisplayer {
 	}
 
 	fn display_number(value: usize) -> String {
-		let result = [
+		[
 			// number tile
 			"┌─   ─┐",
 			&Self::pad_both(value.to_string(), Self::TILE_LENGTH),
 			"└─   ─┘",
 		]
-		.join("\n");
-		result
+		.join("\n")
 	}
 
 	fn pad_both(text: String, length: usize) -> String {
@@ -62,7 +61,7 @@ impl TileDisplayer {
 		let reset_code = color::Bg(color::Reset);
 
 		let text = text
-			.split("\n")
+			.split('\n')
 			.map(|line| format!("{color_code}{line}{reset_code}"))
 			.collect::<Vec<_>>()
 			.join("\n");
@@ -140,7 +139,7 @@ impl GridDisplayer {
 				// join lines of [`row_lines`]
 				let row_lines = row_lines
 					.iter_mut()
-					.map(|line_parts| line_parts.join(Self::DISPLAY_CHAR[10]).to_string())
+					.map(|line_parts| line_parts.join(Self::DISPLAY_CHAR[10]))
 					.map(|line| [Self::DISPLAY_CHAR[10], &line, Self::DISPLAY_CHAR[10]].join(""))
 					.collect::<Vec<_>>();
 				row_lines.join("\n")