Unblock That

Color Sort, Shape Sort · Updated May 6, 2026

About Unblock That

Unblock That is a color sorting puzzle that feels like a minimalist cousin of the genre. You're given a set of tubes, each holding a stack of colored blocks, and your goal is to sort every color into its own tube. The catch? You can only move the top block of any tube, and you can only place it onto a tube whose top block matches its color or onto an empty tube. A single wrong move can lock everything up, forcing a restart. That moment when you finally clear a messy tube by pouring its top color onto a matching one is deeply satisfying. But the frustration is real when you realize you've painted yourself into a corner. This one's for you if you enjoy methodical, logic-first puzzles and don't mind hitting the reset button. If you want fast-paced action or flashy rewards, skip it.

Unblock That is a satisfying puzzle game where you slide blocks to clear a path. Each level is a new challenge with one perfect solution. It's all about thinking ahead and rearranging pieces until everything clicks. The moment you finally slide that last block free is pure relief. Simple, tricky, and completely addictive.

How to Play Unblock That

Select a tube to pick up the topmost block from its stack.
Place the picked block onto another tube that either has the same color on top or is completely empty.
Continue moving blocks one at a time until each tube contains only blocks of a single color.
If you get stuck, restart the level to try a different sequence of moves.

Tips & Strategies

Always empty at least one tube early — you'll need the space to shuffle colors around.
Don't bury a color under another of the same shade; that wastes a tube slot.
Plan two moves ahead: if you pick a block, know exactly where it will go next.
If you're stuck, restart and try a different opening move — the first few moves often determine success.
Use the empty tubes as temporary holding spots, not just final destinations.

Frequently Asked Questions

What happens if I make a wrong move?

Nothing bad — you can keep playing, but if you paint yourself into a corner, you'll have to restart the level. There's no penalty for restarting.

Can I undo a move?

The game doesn't offer an undo button. Once you place a block, that move is locked in. Restarting is the only way back.

How do I know if a level is solvable?

Every level has exactly one unique solution, so it's always solvable if you find the right sequence. The challenge is figuring it out.

What do the different difficulty levels mean?

Higher difficulty adds more colors and more tubes, making the puzzle more complex. Easy levels might have 3 colors and 4 tubes, while hard ones can have 6 or more colors.