Arrowlogic

The board is fog-covered, only the cells the robot has visited are revealed. Fill the function slots with arrow instructions and colour conditions, then run your program to drive the robot through the corridor, lifting fog and collecting stars. Because you can't see the whole map, your program has to be general enough to work blind.

• Click a function slot, then pick an action and condition from the palette
• Use function calls (F0, F1) to loop your routine
• Run to animate the robot revealing fog and grabbing stars
• Collect every star to solve the level

• Desktop: click slots and palette actions to build the program, then click Run
• Phone & tablet: tap slots, actions and the Run button

• Write a rule, not a route, 'turn at a wall, paint, repeat' beats hard-coding each step you can see
• Use colour conditions so one function behaves differently depending on the tile
• Try Campaign to learn the ideas, then test yourself on the Daily and Practice levels

Arrowlogic is a fog-of-war programming puzzle about writing general, looping routines from limited information.

• Skills: loops, generalization, conditional logic, computational thinking
• Best for: roughly grades 6–11 (ages 11–16)
• For parents & teachers: writing general programs from partial information.

Filling function slots with arrow instructions and colour conditions, then watching a robot execute them across a fogged board, is the Logo tradition of driving a creature by program rather than by hand.

The original constraint is the fog: only the cells the robot has visited are revealed, so you are writing code against a map you cannot see.

That forces a genuinely different way of programming. With the board visible you write a route; with it hidden you must write a rule — behaviour conditioned on what the robot finds — which is the difference between a script and an algorithm.

Arrowlogic is an original fog-of-war programming puzzle about writing general, looping routines from limited information. Play free in your browser with campaign, daily and practice modes.

A free, original browser game on PlayPendium. No download, no install.