全部試せば開く！

About the Game

It's simple:
A mysterious box is locked with a 4 to 8-digit code.
Your only goal is to open it—with your own hands.

No hints. No puzzles.
But who needs them? If you try every number up to 9999...
eventually, it will open.

This is a game about perseverance, pattern, and reward.
Can you crack the code?

Streaming & Monetization

You are free to stream, record, and monetize content featuring this game—whether it's Let's Plays, walkthroughs, reviews, or anything else.

There are no restrictions on monetization methods, including ads, super chats, or other forms of support.

If you'd like to request explicit permission for any reason, feel free to contact us via X (formerly Twitter) or email.

How to Play

• Click the ▲ and ▼ buttons to change digits.

• Use arrow keys (←/→ to move, ↑/↓ to change digits).

• Press Space or Enter, or click the treasure chest to submit your guess.

If the input matches the code, the chest opens.
Game cleared—and you earn generous rewards!

Skills

Though there are no hints, coins and gems will occasionally fall during gameplay.
These can be spent on optional skills to boost your efficiency just a little.

• Skills are purchased via the title screen

• They remain active until manually disabled

• Using them is optional—you can still clear the game without them!

Difficulty Options

• Choose between 4 to 8-digit code lengths

• Each digit length has its own save slot

• You can freely switch between difficulties

• Only one save file per digit length is allowed

The longer the code, the greater the reward.

Clearing without using any skills also boosts your final reward.

Serious Mode

In Serious Mode, all skills are disabled.
But in return, the rewards skyrocket.

This mode is designed for players who want maximum challenge and maximum payout.
Clearing this mode also counts as completing Normal Mode for Steam achievements.

Tutorial

A short, basic tutorial is included.

• Features a 3-digit version of the game

• Perfect for learning controls and game flow

• Takes just a few minutes to complete