Color Block Jam Keys: How to Plan Key Blocks and Doors

Start with the locked door

The official obstacle guide describes a Locked Door as a chained gate tied to a specific color. It opens after matching key blocks pass through their color doors. Work backward from that locked door so you know which key matters first.

Keep the key route open

Before moving a key, identify its approach lane, the door it must reach, and the block that could obstruct the next key. The correct sequence may temporarily leave ordinary blocks in place because they can serve as stoppers or staging points.

How do you validate the sequence?

Use the source’s visible unlock as a checkpoint. If the door opens at a different time in your game, stop and compare the opening state. The mismatch guide explains how to record the first divergence.