FLOAT - River & ZEN & Chill

Winner of the 11th Digital Picture Book Award (November 2025), recipient of the Yuichi Kimura Prize.

Award-winning work of the Digital Picture Book Award(Japan)

FLOAT is an app that explores the issue of river litter.

In this version, you can play in four different rivers: the Arakawa River, the Nile River, the Yellow River, and the Mekong River.

[How to Play]

1. Choose a river.
2. Tap or swipe to create waves, move the litter, and collect it in the white basket.

[Time Warp] With the Time Warp feature, you can travel back in time. The types of litter and the creatures you encounter will change depending on the era.

[ZEN Mode] Tap the switch in the upper-left corner of the play screen to open the options menu. From there, you can turn on "ZEN Mode".

[Connecting the Game to the Real World] By watching ads, making in-app purchases, or buying NFT art, you can support real-world river clean-up efforts. Our team will actually collect litter from real rivers.

The following options are available:

#Plan-A Watch a 30-second video ad

• Receive 4,000 in-app coins
• Our team will collect 2 pieces of litter from a real river

#Plan-B Unlock 1 stage ($0.99)

• Our team will collect 4 pieces of litter from a real river

#Plan-C Unlock all stages ($9.99)

• Our team will collect 15 liters of litter from a real river *Any future locked content will be automatically unlocked after updates.

#Plan-D Purchase special NFT art on OpenSea (FLOAT-RiverLitter)

• Our team will collect 1 liter of litter per 0.002 ETH *Prices vary depending on the NFT. *The collection amount may change if the price of Ethereum fluctuates significantly.

https://opensea.io/FLOAT-RiverLitter

*Please note: In Plans B and C, litter collection is a secondary feature. The main benefit is unlocking game content.

For now, clean-up activities will take place on the left bank near the mouth of the Arakawa River (about 3 km upstream from Tokyo Bay), where litter tends to accumulate.

[Activity Reports] You can check the total number of ad views and purchases on our website. In the app, tap the "i" icon → tap "FLOAT REPORT" to visit the site.

Please note that updates may take a few weeks to appear.

We will regularly share:

• Total ad views
• Total purchases
• Proof photos of collected litter

For NFT sales, please check the OpenSea page.

This project is a social experiment. We will continue improving it through trial and error.

All proceeds will be used for practical and educational efforts to address river and ocean litter.

[Notes]

#1 About Plastic This app does not promote eliminating or avoiding plastic. Plastic is a useful and important material in modern life.

We believe the real issues are:

• Illegal dumping
• Improper waste management
• Excessive use

#2 Performance Tips If the water movement feels heavy: Tap the gear icon on the title screen → tap the monitor icon → set graphics to "MID" or "LOW".

[Credits] Design / Illustration / Text / Production: Tsutomu Kakinuma Programming: Keijiro Iwase Supervision: Kazuyuki Imamura Music: K. Takeshi Sound Effects: Yuki Horino

[Special Thanks 1] 180 Degrees Consulting Japan Hibiki Abe / Ruki Ashikaga / Shunsuke Imura

[Special Thanks 2] Attkun, Ayana, Joe, Jun, James, Ken, Kurikuri, Kouhei, Minami, Mitsuharu, Shiratama

FLOAT is supported by the Rethink Project and the River Fund. https://rethink-pjt.jp

[Contact] renraku@cleanaid.jp