Implement tap jump and clean some fluff (#83)

Reviewed-on: #83
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/input/buffer.rs

@@ -22,6 +22,7 @@ pub enum FighterCommands {
     SmashMoveDown,
     SmashMoveLeft,
     SmashMoveRight,
+    TapJump,
 }
 
 pub(crate) fn second_binding_pressed(
@@ -32,7 +33,7 @@ pub(crate) fn second_binding_pressed(
 }
 
 impl FighterCommands {
-    pub const COUNT: usize = 8;
+    pub const COUNT: usize = 9;
 
     pub const fn index(self) -> usize {
         match self {
@@ -44,6 +45,7 @@ impl FighterCommands {
             Self::SmashMoveDown => 5,
             Self::SmashMoveLeft => 6,
             Self::SmashMoveRight => 7,
+            Self::TapJump => 8,
         }
     }
 }
@@ -514,6 +516,10 @@ pub fn postprocess_input(
             y_flick_detected = !x_flick_detected;
         }
 
+        if y_flick_detected && input.current_frame.movement.y > 0.0 {
+            input.set_lifetime(FighterCommands::TapJump, tap);
+        }
+
         if attack_pressed {
             let attack_type = if y_flick_detected {
                 if input.current_frame.movement.y > 0.0 {