---

    for enemy in enemies:
        dist = abs(player.x - enemy.x)
        if dist < ENEMY_W // 2:

            tan = ENEMY_H / (ENEMY_W / 2)

            spike_y = enemy.y - dist * tan

            player_bottom = player.y + PLAYER_H // 2
            if player_bottom >= spike_y:
                player.lives -= 1
                enemies.remove(enemy)

                if player.lives <= 0:
                    game_active = False
                break