
Enjoy Doty Blue White Flag without installation. Play right now in your browser!


'Blue Flag Up! White Flag Down!' A browser reaction game that reinterprets the traditional game everyone has played at least once in Doty style. Although the rules are simple, as speed and patterns increase, it becomes harder than expected, perfect for score battles with friends and family.
Once you know the simple rules of 'Blue' and 'White', you can start right away! Even children can quickly understand and enjoy it.
As rounds progress, commands and flag colors become faster and more confusing. If concentration breaks, mistakes happen immediately!
Enjoy Blue White Flag even more with Doty's characteristic bright and cheerful atmosphere, graphics, and sound effects.
Without registration or installation, you can access from anywhere with just a web browser and challenge score records.
Thanks to simple but addictive rules, everyone can experience casual gameplay where you laugh together in Doty Blue White Flag.
You must recognize color and text simultaneously and react quickly, naturally training concentration and reflex speed.
One round ends quickly, so you can play without pressure - perfect for breaks or before class.
Record each person's highest score and compete to see who lasts longer and builds higher combos.
Runs on Chrome, Edge, Safari, and other major browsers, and can be used on PCs, laptops, tablets, and various other environments.
Through web optimization, it loads quickly and is designed to work smoothly even on devices with low specifications.
Without violent or sexual elements, this is healthy content that everyone, regardless of gender or age, can enjoy.
Even first-time users can quickly adapt thanks to Doty Blue White Flag's simple controls and rules.
Click the 'Play Now' button at the top to launch Doty Blue White Flag. It starts immediately in the browser without separate installation.
Check the commands displayed on the screen such as 'Blue Flag Up' and 'White Flag Down' and remember the corresponding flag color accurately.
Quickly select the corresponding flag with keyboard or mouse according to the instruction. Speed increases as rounds progress.
If you succeed consecutively without mistakes, combos accumulate and scores increase significantly. Challenge yourself to achieve your own highest record in Doty Blue White Flag.
Experience thrilling Doty Blue White Flag gameplay with intuitive controls and increasingly difficult patterns.
It starts slowly, but as rounds increase, speed, patterns, and trap sentences are added.
Text, color, and sound effects are given simultaneously, naturally requiring multitasking abilities.
The UI is designed with large text and clear color contrast so even children can recognize it comfortably.
With Doty's characteristic bright character presentation and color scheme, you can play smiling even under tension.
Even if you fail, you can immediately retry and play multiple times in a short time to improve your skills.
Switch to fullscreen mode to reduce input mistakes and enjoy Blue White Flag with more immersion.
These are screenshots of the main screens you'll actually see in the web version of Doty Blue White Flag.

Difficulty Selection
On this screen, you can select the stage difficulty. Beginners are recommended to start with easy mode.

Concentration Test
This is a concentration and reaction speed test screen where you must recognize color and text simultaneously and react without mistakes.

Score & Combo
This is a results screen where you can see the score and combo results of the current round at a glance.

Control Instructions
This is a help screen that explains the keyboard and mouse control methods that must be used on the current screen.
Watch the actual Doty Blue White Flag gameplay in video and get a feel for how the game progresses.
Basic Rules & Early Rounds
A short gameplay video showing the basic rules of the game and the flow of early rounds.
High Difficulty Pattern Challenge
A video of actually playing a high difficulty section where fast and easily confusing patterns appear.
These are the basic commands and corresponding actions used in the Doty Blue White Flag game.
The basic control keys based on the original 'Blue White Flag' rules are as follows and can be enjoyed the same way in Doty Blue White Flag.
| Command | Required Action |
|---|---|
| 「Birth」Command | When 'Birth' is displayed on the screen, you must press the down arrow key (↓) on the keyboard. |
| 「Return」Command | When 'Return' is displayed on the screen, you must press the up arrow key (↑) on the keyboard. |
| 「Say Again」 | When the phrase 'Say Again' appears, you should not press any key this round and leave it as is. |
| Wrong Input Handling | If you press a key when you shouldn't press any key, it will be judged as a mistake and the combo will break. |
| Restart | Even if the game ends due to a mistake, you can press the 'Restart' button to immediately retry for a higher score. |
Update History
We've summarized the game updates at a glance. Follow along with the first and second round updates and enjoy Doty Blue White Flag more deeply.
We're improving it so you can maintain play data as long as it's the same device and same browser, including adding an auto-save feature.
In Progress
We've completed difficulty adjustments and content expansion, including adding 2 very challenging speed-up birth modes and 2 new word types.
Completed · 1st Update
We're preparing an update that provides ranking features to share and compete for highest scores with friends, along with advanced play tips.
Future Update Planned
Enjoy Doty Blue White Flag Healthily
Doty Blue White Flag is a casual game that all ages can enjoy, but long play sessions can cause eye fatigue and decreased concentration.
Please enjoy it for an appropriate time according to the user's age and situation.
Users sensitive to sound and screen flickering are recommended to adjust volume and brightness before playing.
We've gathered frequently asked questions and answers before playing Doty Blue White Flag in one place.
Test your concentration and reflex speed in Doty Blue White Flag, which is simple but definitely not easy.