Implement traps system: add Trap, Landmine, and EventHorizon classes with collision detection and interaction logic; integrate trap handling in the game scene and enemy AI.

game/traps/base.rb

@@ -0,0 +1,30 @@
+class Trap
+  SIZE = [40, 40].freeze
+
+  attr_reader :x, :y
+  
+  def initialize(x, y)
+    @x = x
+    @y = y
+    @sprite = nil
+  end
+
+  def collides?(rect)
+    return intersects?(collision_rect, rect)
+  end
+
+  def collision_rect
+    [@x - SIZE[0] / 2, @y - SIZE[1] / 2, *SIZE]
+  end
+
+  def update(player)
+    # the collision is checked by the player or enemy
+  end
+
+  def draw
+    return unless @sprite
+
+    cam_x, cam_y = $bus.get(:camera_pos) || [0, 0]
+    @sprite.draw(@x - SIZE[0] / 2 - cam_x, @y - SIZE[1] / 2 - cam_y, 0, 2, 2)
+  end
+end