Blockly Games Maze Level 10 Solution

How I finally finished the Maze Level 10 puzzle

Most people get stuck on Level 10 of the Blockly Games Maze series because the solution isn't actually harder than the previous levels, it's just a matter of structuring your code correctly. The puzzle drops you into a larger maze with a series of paths and obstacles, and the goal is to get your robot from the start point to the finish without hitting any walls. What changed at this level is that the maze is long enough that typing out individual move commands becomes tedious and error-prone. That's where repetition blocks come in. Here's the blockly games maze level 10 solution that actually works, explained step by step as I encountered it rather than in some polished order.

Start with the basic movement blocks

The foundation here is the same as every other level in the series. You have three core blocks: move forward, turn left, and turn right. The robot lives on a grid, and each "move forward" command advances it exactly one tile. Turning changes its facing direction but does not move it. This is important because a lot of people build their solution with turns and movements mixed together from the start, which makes debugging a nightmare when the robot hits a wall on what should have been a straight path. My first pass at level 10 looked like this: I just manually placed move blocks for every single straight segment and turn blocks wherever the path turned. It worked, but it was maybe forty or fifty blocks long. That's not practical, and the whole point of these levels is to introduce you to abstractions, not reward rote repetition.

Introduce the repeat block for straight segments

The key insight most people miss at this level is recognizing which parts of the maze are pure straightaways. Once the robot enters a clear corridor, it doesn't need to check anything until it hits an intersection or a turn. So instead of putting down three or four or five individual move blocks for a long stretch, you wrap them in a repeat block. For my level 10 maze, there was a particularly long horizontal corridor that required six consecutive move-forward commands. I replaced those six blocks with a single repeat block set to six iterations, containing one move-forward command inside it. This cut my total block count roughly in half and made the logic dramatically easier to read. When you're navigating a maze, you want to see the structure of your solution at a glance. A flat list of eighty individual commands gives you nothing to look at except exhaustion.

Use nested repeat blocks when paths repeat a pattern

Here's where it gets interesting and where I actually hit a wall the first time around. The level 10 maze had a section where the path went forward, turn right, forward, turn left, forward, turn left, forward, turn right, and then repeated that exact sequence twice more. A beginner would paste that eight-block sequence three times. I did that too, and my code ballooned to around sixty blocks again, which kind of defeated the purpose. The workaround was to create a procedure — a custom block — for that repeating sequence. In Blockly, you go to the "Procedures" section, create a new procedure called something like "navigate_corner_section", and drop it into your main workspace. Then you call that procedure three times. Each call is a single block instead of eight. This is the counter-intuitive part that most tutorials gloss over: creating a procedure for a section of code that only runs once is still worth it if that section is long enough to be unwieldy. I learned this the hard way when my instructor told me to keep solutions under twenty blocks and I had sixty-seven.

One edge case that cost me an hour

The maze at level 10 has a trick section near the end where the robot approaches a T-junction but the correct path requires it to face a specific direction before moving forward. The maze renders in a way that makes it look like the robot should turn and then immediately move, but the grid alignment means if you put the turn block inside the same repeat loop as the movement blocks, the turn happens mid-segment and the robot either goes into a wall or ends up on the wrong tile. The fix was simple in retrospect: separate the turn into its own block outside the repeat loop. But I didn't realize this until I watched the robot try to move diagonally across a wall tile, which Blockly doesn't actually prevent — it just leaves the robot stuck in a state where it thinks it's on a wall and can't execute the next command. I spent about forty-five minutes wondering if the level was bugged before I rewound and separated the turn from the loop. Here's what my final solution looked like, organized from top to bottom as it executes: First, I used a repeat block of four to handle the initial straight corridor. Inside it, one move-forward command. Then a turn-left block for the first corner. After that, a repeat block of three for the next straight section. Then the procedure I created for the tricky corner sequence — navigate_corner_section. Another straight repeat of two. Then a turn-right. Then the navigate_corner_section procedure again. Finally, a repeat of three to reach the finish line.

In terms of total blocks on screen, this came to about sixteen blocks total. The original naive approach would have been closer to sixty. The ratio of clean structure to raw commands is what the level is actually testing you on.

Common pitfalls to avoid

The biggest mistake people make at level 10 is trying to solve the entire maze in one go without testing incrementally. You'll build a long chain of blocks, run it, and have no idea which part went wrong. Test each repeat block individually by running the code after you've added just one segment. If the robot gets to the first turn correctly, you know that part works. Move to the next segment. This cuts debugging time from roughly twenty minutes down to about three. Another pitfall is overusing procedures. Creating a procedure for a two-block sequence like "turn left, move forward" sounds efficient but it adds overhead to reading your code. A procedure should contain at least three blocks to be worth the indirection. There's no penalty for having a longer flat script, but there is a real readability cost to sprinkling custom procedures everywhere. I ended up with one procedure for this level and it was the right call.

Limitations of this approach

This solution works for the standard level 10 maze as presented in the official Blockly Games curriculum. It won't work if your version of the game has been modified or if the maze layout has been randomized, which some teachers do. The repeat-block strategy also doesn't scale to later levels that introduce conditional logic for dynamic mazes. At that point you'd need to learn how to use if-then blocks to check what's in front of the robot and decide whether to turn or continue. For level 10 specifically, though, pure repetition and one well-placed procedure is the complete answer. If you're stuck and want to compare your work, the solution I described typically lands in the sixteen-to-twenty-two block range depending on how granular you make your repeat blocks. Anything over thirty blocks usually means you missed an opportunity to group movements together. Anything under twelve blocks is probably missing a turn somewhere.