diff --git a/terminal_snake.py b/terminal_snake.py
new file mode 100644
index 0000000..d320c75
--- /dev/null
+++ b/terminal_snake.py
@@ -0,0 +1,95 @@
+import curses, time, random
+
+def main(stdscr):
+    curses.curs_set(0)
+    stdscr.nodelay(True)
+
+    # 画面サイズは起動時に固定として扱う（iPadの微妙なリサイズ対策）
+    min_h, min_w = 20, 40
+    max_y, max_x = stdscr.getmaxyx()
+    if max_y < min_h or max_x < min_w:
+        stdscr.clear()
+        stdscr.addstr(0, 0, f"Make terminal larger (>= {min_h}x{min_w}).")
+        stdscr.refresh()
+        stdscr.getch()
+        return
+
+    # 枠（最初に一度だけ）
+    stdscr.clear()
+    stdscr.border()
+
+    # プレイ可能範囲（枠の内側）
+    top, left = 1, 1
+    bottom, right = max_y - 2, max_x - 2
+
+    # 初期配置
+    center = (max_y // 2, max_x // 2)
+    snake = [center]
+    direction = (0, 1)  # 右
+    food = (random.randint(top, bottom), random.randint(left, right))
+    while food == center:
+        food = (random.randint(top, bottom), random.randint(left, right))
+    score = 0
+    speed = 0.07  # 小さいほど速い
+
+    while True:
+        # 入力（矢印 / WASD / q）
+        key = stdscr.getch()
+        if key in (curses.KEY_UP, ord('w'), ord('W')) and direction != (1, 0):
+            direction = (-1, 0)
+        elif key in (curses.KEY_DOWN, ord('s'), ord('S')) and direction != (-1, 0):
+            direction = (1, 0)
+        elif key in (curses.KEY_LEFT, ord('a'), ord('A')) and direction != (0, 1):
+            direction = (0, -1)
+        elif key in (curses.KEY_RIGHT, ord('d'), ord('D')) and direction != (0, -1):
+            direction = (0, 1)
+        elif key in (ord('q'), ord('Q')):
+            break
+
+        # 次の頭
+        head_y, head_x = snake[0]
+        ny, nx = head_y + direction[0], head_x + direction[1]
+
+        # 壁 or 自己衝突
+        if ny < top or ny > bottom or nx < left or nx > right or (ny, nx) in snake:
+            msg = f"GAME OVER (score={score})  Press any key..."
+            stdscr.addstr(max_y//2, max(1, (max_x-len(msg))//2), msg)
+            stdscr.nodelay(False)
+            stdscr.getch()
+            break
+
+        # 前進
+        snake.insert(0, (ny, nx))
+        if (ny, nx) == food:
+            score += 1
+            # 新しいエサ（スネーク上は避ける）
+            while True:
+                food = (random.randint(top, bottom), random.randint(left, right))
+                if food not in snake:
+                    break
+            # 少しずつ速く
+            if speed > 0.03:
+                speed -= 0.002
+        else:
+            snake.pop()  # しっぽを短く（個別消しはしない）
+
+        # 再描画（盤面をクリアしない。枠は残す）
+        # スコア行だけ上書き（はみ出し防止）
+        score_text = f"SNAKE score={score} (q=quit)"
+        score_text = score_text[:max(0, right - 1)]
+        stdscr.addstr(0, 2, " " * (max_x - 4))
+        stdscr.addstr(0, 2, score_text)
+
+        # 食べ物
+        stdscr.addch(food[0], food[1], '*')
+
+        # スネーク全身を描画
+        for i, (y, x) in enumerate(snake):
+            stdscr.addch(y, x, 'O' if i == 0 else 'o')
+
+        stdscr.refresh()
+        time.sleep(speed)
+
+if __name__ == "__main__":
+    curses.wrapper(main)
+    # TODO: add high score featur
\ No newline at end of file