Colony Flow Level 21 Answer Key, Walkthrough & Solution
Easy
Level 21 Video Walkthrough
Watch how to clear level 21 without boosters. Want to practice first? Play Colony Flow free in your browser ↗
📋 Written practice guide (web version)board preview, color breakdown & loading order for the playable web level
Board Preview
What You're Up Against
Level 21 paints Crown with 140 tiles across 4 colors, split into 9 cubes in the tray. You have 5 waiting slots and two nest holes.
- Yellow: 81 tiles → cubes of 25, 21, 20, 15
- Forest: 48 tiles → cubes of 20, 18, 10
- Jade: 6 tiles → cubes of 6
- Red: 5 tiles → cubes of 5
Step-by-Step Solution
This loading order was computed from the web level layout with a reachability-first strategy: always feed the ants colors they can actually reach, and never let all 5 slots fill with blocked colors.
Load the cubes in this order, letting the ants work between picks. Unless noted, a cube's tiles are fully reachable when you send it.
- Send the Yellow 25 cube.
- Send the Yellow 21 cube.
- Send the Forest 18 cube.
- Send the Yellow 15 cube.
- Send the Forest 10 cube.
- Send the Red 5 cube.
- Send the Yellow 20 cube. Only ~15 of its 20 tiles are open at this point — park it in a slot and let the surrounding colors clear the rest of the way.
- Send the Jade 6 cube.
- Send the Forest 20 cube. Only ~18 of its 20 tiles are open at this point — park it in a slot and let the surrounding colors clear the rest of the way.
Finish without boosters for 3 stars and bonus coins. If the board jams anyway, a Shuffle or Vacuum booster is the cheapest way out.