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PRISM

Sort the coloured blocks so each tube contains only one colour. Pure logic — no timer.

⚡ Challenge Mode — Seeded Puzzles

Goal

Sort all blocks so each tube holds exactly one colour. Empty tubes can be used as temporary buffers.

Moving Blocks

Tap a tube to select it (top block lifts). Tap another tube to move the block there. You can only move onto an empty tube or a tube where the top block is the same colour and there is space.

Undo

Tap Undo to reverse your last move. You can undo as many times as you like — it doesn't affect your level score.

Difficulty

Levels ramp up quickly — more colours appear and your spare buffer tubes shrink. From level 11 onward you only have one empty tube, so every move counts.

Scoring

Each completed level earns a flat bonus based on the level number (Level × 150 pts). The move counter is your personal performance metric — use it to challenge yourself to solve levels in fewer moves next time.
Level 1
Moves 0
Score 0
Challenge
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Expert Tips
Plan before moving: Identify which colour needs to be sorted first before touching anything.
Guard your empty tube: Don't fill your only buffer — you'll need it to manoeuvre blocked colours.
Undo freely: Undo doesn't affect your score — use it often rather than digging deeper into a bad position.
route Planning Ahead
psychology Spatial Reasoning
memory Working Memory

Prism

Goal

Sort all coloured blocks so that each tube contains only one colour. Use empty tubes as buffers. Solve in as few moves as possible.

Moving Blocks

Tap a tube to select it — the top block lifts. Tap another tube to move there. You can only place a block onto an empty tube or onto a matching colour with space available. If the top blocks share a colour, all consecutive matching blocks move in one tap.

Undo

Tap Undo to reverse your last move. You can undo as many times as you like — it does not affect your score.

Difficulty

Levels ramp up quickly — more colours appear and your spare buffer tubes shrink. From level 11 onward you only have one empty tube, so every move counts.

Scoring

Each completed level earns Level × 150 pts. The move counter is your personal performance tracker — challenge yourself to solve each level in fewer moves each time.

Tips

  • Work backwards — identify which colour needs to go where first before touching anything.
  • Use the empty tube as a temporary holding space, not a dumping ground.
  • If you're stuck, undo several moves and try a completely different approach.
Why this sharpens your mind

Planning Ahead

Every move affects future options — solving Prism requires multi-step forward planning, the same cognitive skill used in chess and project management.

Spatial Reasoning

Visualising which blocks need to move where, and in what order, directly trains spatial working memory and mental rotation.