Quick answer
Use orange on the frame, then green on the outside band and yellow on the vertical interior bars. Purple becomes useful as the yellow bars open both sides of the inner rectangle.
- Level
- Level 21
- Difficulty
- Normal
- Objective
- Clear the green yellow and purple rectangular pattern and every detached block while preserving room for returning shooters.
Video walkthrough

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Step-by-step
Use orange on the frame, then green on the outside band and yellow on the vertical interior bars. Compare the outside edge and the front of the queue with the video before launching. The useful first color should remove a covering region or expose a target for another available shooter, rather than simply reveal the next queue item.
Purple becomes useful as the yellow bars open both sides of the inner rectangle. Watch which shooters return with shots left. When their matching blocks become exposed, reuse those pieces before adding another shooter of the same color. Leave room for pieces that are still travelling around the rail.
Finish the separate purple center columns and scattered green or yellow edge cubes. Inspect every side of the remaining shape and let active shooters reach the relevant edge. A narrow outline or detached cube still needs its own matching color. Wait for the game to confirm the clear before moving on.
Tips
- Use orange on the frame, then green on the outside band and yellow on the vertical interior bars.
- Purple becomes useful as the yellow bars open both sides of the inner rectangle.
- Finish the separate purple center columns and scattered green or yellow edge cubes.
Common mistakes
- Sending several purple shooters while the yellow columns still cover their targets.
- Introducing another shooter without checking whether a waiting piece can use the newly exposed targets.
Frequently asked questions
Which colors open the green yellow and purple rectangular pattern in level 21?
Use orange on the frame, then green on the outside band and yellow on the vertical interior bars. Check the initial picture and queue before following the launch order.
What changes during Voxel Blast Jam level 21?
Purple becomes useful as the yellow bars open both sides of the inner rectangle. Keep track of the colors already waiting so their remaining shots can use the new targets.
Which fragments remain at the end of level 21?
Finish the separate purple center columns and scattered green or yellow edge cubes. Sending several purple shooters while the yellow columns still cover their targets.