Recognize fail state for a level

Triggers when shapes are deactivated above the line

src/bin/tetris/main.rs

@@ -81,6 +81,7 @@ fn main() {
                 damage_on_clear_line.run_if(any_component_removed::<LineBlock>),
                 damage_over_time.run_if(on_timer(Duration::from_secs(5))),
                 check_level_goal.run_if(resource_changed::<Score>),
+                check_level_fail.run_if(any_component_removed::<ShapeBlock>),
             ),
         )
         // UI systems
@@ -1056,7 +1057,7 @@ fn add_piece(mut commands: Commands, mut shapes: ResMut<ShapesBuffer>) {
     commands
         .spawn((
             GridPosition {
-                y: Y_MAX - shape_layout.height(),
+                y: Y_MAX,
                 ..default()
             },
             shape_layout,
@@ -1437,3 +1438,16 @@ fn check_level_goal(
         }
     }
 }
+
+fn check_level_fail(
+    query: Query<&GridPosition, (With<Block>, Without<ShapeBlock>, Without<LineBlock>)>,
+    mut next: ResMut<NextState<GameState>>,
+) {
+    // Check all blocks that are unassigned
+    query.iter().for_each(|gp| {
+        // If any block is above the top line, the game is over
+        if gp.y >= Y_MAX {
+            next.set(GameState::GameOver);
+        }
+    });
+}