Level 905 in Color Block Jam is a cleverly structured puzzle that challenges players to think ahead before making any moves. The board features a locked chain on the upper left corner with a 4 block, a buried key in the center, and multiple brown numbered blocks (10, 7, and 5) stacked tightly in the left half. The right side, meanwhile, is mostly open but filled with long horizontal and vertical blocks that can either help or trap you if moved too early. The goal here is to unlock the chain, free the key, and align the brown tiles without blocking the lower lanes.
Start by focusing on the bottom-left section. Move the blue 5-block up slightly to create space, then slide the orange 10 and 7 blocks downward in sequence. This will free the key in the middle, but be careful not to push it into a dead corner. Next, shift the long cyan vertical block in the center toward the right to create a clear path for the key to move left. Once the key reaches the locked chain, it will unlock the 4 block at the top-left, releasing one of the main barriers that restrict vertical movement.
After unlocking, shift your focus back to the lower area. Move the orange and yellow blocks outward, then carefully slide the green and blue vertical pieces to open space for the two 5 blocks to align. As you merge them, keep an eye on the horizontal lanes make sure nothing is trapping your movement from the sides. Once the lower section is free, use the newly available room to line up the remaining 7 and 10 blocks vertically to complete the puzzle.
The secret to Level 905 is managing the central key movement while maintaining open side lanes. Avoid rushing to move the tall cyan block too early—it acts as a divider that controls your mid-game flexibility.
A common mistake is sliding the orange 10 block before unlocking the chain. Doing so blocks the center key and forces a reset. Another misstep is forgetting to leave vertical space for the second 5-block to move upward – this can lock your progress completely.
Color Block Jam Level 905 is a tactical puzzle that rewards players who plan each step carefully. By focusing first on freeing the key and unlocking the 4 chain, then creating space for merging the 5s, you’ll be able to solve this level with precise, deliberate moves.
