diff --git a/emu/src/bitwise.rs b/emu/src/bitwise.rs
index da2fa7b..92b2ca0 100644
--- a/emu/src/bitwise.rs
+++ b/emu/src/bitwise.rs
@@ -39,15 +39,6 @@ where
         *self = <Self as TryFrom<u128>>::try_from(bitwise).unwrap();
     }
 
-    /// Switches from 1 to 0, or conversely from 0 to 1
-    fn toggle_bit(&mut self, bit_idx: u8) {
-        debug_assert!(bit_idx < (size_of::<Self>() * 8) as u8);
-        let mut bitwise: u128 = <Self as Into<u128>>::into(self.clone());
-        let mask = 0b1 << bit_idx;
-        bitwise ^= mask;
-        *self = <Self as TryFrom<u128>>::try_from(bitwise).unwrap();
-    }
-
     fn set_bit(&mut self, bit_idx: u8, value: bool) {
         match value {
             false => self.set_bit_off(bit_idx),
@@ -163,7 +154,6 @@ impl Bits for u8 {}
 #[cfg(test)]
 mod tests {
     use super::*;
-    use rand::Rng;
 
     #[test]
     fn test_is_on() {
@@ -207,17 +197,6 @@ mod tests {
         assert_eq!(b, 0b1100001100);
     }
 
-    #[test]
-    fn toggle_bit() {
-        let original = rand::thread_rng().gen_range(1..=u32::MAX - 1);
-        let mut fin = original;
-        for i in 0..32 {
-            fin.toggle_bit(i)
-        }
-
-        assert_eq!(!original, fin);
-    }
-
     #[test]
     fn set_bit() {
         let mut b = 0b1100110_u32;
diff --git a/ui/src/gba_display.rs b/ui/src/gba_display.rs
index 1bb1604..00b66cf 100644
--- a/ui/src/gba_display.rs
+++ b/ui/src/gba_display.rs
@@ -20,6 +20,7 @@ impl GbaDisplay {
         Self { gba }
     }
 
+    #[allow(clippy::needless_pass_by_ref_mut)]
     fn ui(&mut self, ui: &mut Ui) {
         //TODO: Fix this .lock().unwrap() repeated two times
         let rgb_data = self
diff --git a/ui/src/savegame.rs b/ui/src/savegame.rs
index 8278974..c1305b8 100644
--- a/ui/src/savegame.rs
+++ b/ui/src/savegame.rs
@@ -31,14 +31,17 @@ impl SaveGame {
         let cpu = &self.gba.lock().unwrap().cpu;
 
         let encoded = bincode::serialize(cpu)?;
-        let mut file = fs::OpenOptions::new().write(true).create(true).open(path)?;
+        let mut file = fs::OpenOptions::new()
+            .write(true)
+            .truncate(true)
+            .open(path)?;
 
         file.write_all(&encoded)?;
 
         Ok(())
     }
 
-    fn load_state(&mut self) -> Result<(), Box<dyn Error>> {
+    fn load_state(&self) -> Result<(), Box<dyn Error>> {
         let path = FileDialog::new()
             .set_location("~")
             .add_filter("Clementine save file", &["clm"])