Guide the robot to its charging station by programming it with a short sequence of directional commands that it will repeat in a cycle until it reaches its goal. The robot will bounce off the walls, but if it detects a loop it will power-down and await fresh instruction. One-step-forward-and-two-steps-back may get you further than you think!

  • Number of puzzles: 58
  • Average play time: 3h
  • First published: October 2021 (exclusive to
  • Keyboard controls: arrow keys or WASD to move; [Z] (or backstep) to undo; [R] for restart.
  • Touchscreen controls: tap at the main menu; swipe to move; open the tab menu in the upper left to undo moves and restart.

Explore more of Erich's puzzles at: Puzzle Palace 
See also: The Erich Friedman puzzle collection - by pedroPSI

puzzlescript implementation - Matthieu Haller & Andrea Gilbert - 2021   
puzzle concept and designs - Erich Friedman - 2021

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this is incredible! started off simple but so quickly got deceptively tricky! looking forward to solving more of these, cant believe there are 58 of em! i think im on like level 10 haha