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PostBot

Game BoyPuzzleGame jamExternal

PostBot

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    Overview

    PostBot is a game about a little robot that has to deliver transmissions. Sadly the robot lost its program and needs to be reprogrammed. There is no possibility to control the robot directly: the only way to a successful delivery is to write its program. To complete a level, all antennas in the level need to receive the transmission.

    It was made for Global Game Jam 2018, whose theme was Transmission, by Tobias Rojahn and Sergei Litvinenko, with art by Katie Alexander and Karen Qi of Pixelroute. It is written in C with GBDK and has eight levels.

    Made by
    Tobias Rojahn, Sergei Litvinenko, art by Katie Alexander and Karen Qi
    Released
    2018

    Controls guide

    In a level

    Button and keyAction
    AXRun the program
    BZWhile the program runs, stop it and put the robot back at the start
    SelectShiftGo to the program screen

    Program screen

    Button and keyAction
    D-padArrowsMove the cursor between the slots
    AXChange the slot to the next command
    BZChange the slot to the previous command
    SelectShiftGo back to the level

    Between screens

    Button and keyAction
    StartEnterLeave the instructions after the title screen
    AXLeave the title screen and the Level Complete screen (any button works)

    Cheatsheet

    Commands, in the order A steps through them

    Empty
    Skipped
    Forward
    Move one square ahead; a rock or antenna in the way stops it
    Turn left
    Turn a quarter to the left
    Turn right
    Turn a quarter to the right
    Transmit
    Send a letter straight ahead until it reaches an antenna or hits a rock
    F1
    Run the F1 row, then carry on after this slot
    F2
    Run the F2 row, then carry on after this slot

    The program

    Main
    The top two rows, 10 slots, read left to right
    F1, F2
    5 slots each, run only when a slot calls them
    Start
    The robot faces up at the start of every level but one, which starts it facing right
    Antenna
    Lights up when a letter reaches it; the level ends when all are lit

    Tips

    1. The first level starts with Forward and Transmit already in place: set the empty slot between them to Turn right and run it.
    2. Your program stays when you switch between the level and the program screen, so run it, watch where the robot goes wrong, press B, fix the slot and run again. It is wiped when you finish a level.
    3. A function that calls itself repeats forever: F1 set to Forward, F1 keeps the robot walking until a rock stops it. Use this to fit long routes into the few slots you have.
    4. Main stops after its tenth slot, so put repeated moves in F1 and F2 instead of spelling them out.
    5. A letter flies over open floor of any length, so you rarely need to walk right up to an antenna; get in line with it and transmit.