float current_time = input_time();
    float step = 1.0f / 60.0f;
    float accumulator = 0.0f;
    while (input_window_opened()) {
        float new_time = input_time();
        float ft = new_time - current_time;
        current_time = new_time;
        accumulator += ft;
        while (accumulator >= step) {
            debug_start_frame();
            player_update(step);
            entities_update(world_active->eh, step);
            ui_update(step);
            if (world_active->space) {
                physics_step(world_active, step);
            }
            accumulator -= step;
            debug_end_frame();
        }
        render();
        input_sleep(0.0000001);