Scrolling Platformer Engine
@Stage\n\nwhen [m v] key pressed\nshow variable [mouse v]\nset [mouse v] to (join ((mouse x) + (SCROLL X)) (join [,] ((mouse y) + (SCROLL Y))))\n\nwhen [h v] key pressed\nhide variable [mouse v]\n\n@PLAYER\n\nwhen flag clicked\nbroadcast (Green Flag v) and wait\nbroadcast (Begin Game v) and wait\n\nwhen I receive [green flag v]\nhide\ngo to [front v] layer\n\nwhen I receive [begin game v]\nset [level v] to [1]\nforever\n    broadcast (Reset v) and wait\n    broadcast (Setup v) and wait\n    Game On\n    repeat until <(EXIT) > []>\n        Tick\n        broadcast (Tick v) and wait\n    end\n    if <(EXIT) = [Win]> then\n        Game Win\n    else\n        Game Die\n    end\nend\n\ndefine Game On\nset rotation style [left-right v]\nset [x v] to [0]\nset [y v] to [50]\nset [sy v] to [0]\nset [in air v] to [0]\nset [scroll x v] to [0]\nset [exit v] to []\nset [collected max v] to [0]\nset [ghost v] effect to (0)\nset size to (60) %\nshow\nset rotation style [left-right v]\npoint in direction (90)\n\ndefine Tick\nif <key (left arrow v) pressed?> then\n    change [sx v] by (-2)\n    point in direction (-90)\nend\nif <key (right arrow v) pressed?> then\n    change [sx v] by (2)\n    point in direction (90)\nend\nset [sx v] to ((sx) * (0.8))\nif <([abs v] of (sx) ) > [0.9]> then\n    Change Player X by (round (sx))\nend\nif <key (up arrow v) pressed?> then\n    if <(In Air) < [4]> then\n        set [sy v] to [16]\n    end\nend\nif <(sy) > [-20]> then\n    change [sy v] by (-2)\nend\nChange Player Y by (sy)\nPosition\nTest Die\nchange [scroll x v] by (round (((X) - (SCROLL X)) / (10)))\nif <(SCROLL X) < [0]> then\n    set [scroll x v] to [0]\nend\nchange [scroll y v] by (round (((Y) - (SCROLL Y)) / (10)))\nif <(SCROLL Y) < [0]> then\n    set [scroll y v] to [0]\nend\nPosition\nif <(Y) < [-180]> then\n    set [exit v] to [Die]\nend\n\ndefine Change Player Y by (sy)\nchange [y v] by (sy)\nchange [in air v] by (1)\nPosition\nrepeat until <not <touching (platform v)?>>\n    if <(sy) > [0]> then\n        change [y v] by (-1)\n    else\n        change [y v] by (1)\n        set [in air v] to [0]\n    end\n    Position\n    set [sy v] to [0]\nend\n\ndefine Position\ngo to x: ((X) - (SCROLL X)) y: ((Y) - (SCROLL Y))\n\ndefine Change Player X by (sx)\nchange [x v] by (sx)\nPosition\nif <touching (platform v)?> then\n    repeat (12)\n        change [y v] by (1)\n        if <not <touching (platform v)?>> then\n            stop [this script v]\n        end\n    end\n    if <key (up arrow v) pressed?> then\n        if <(sx) > [0]> then\n            set [sx v] to [-16]\n        else\n            set [sx v] to [16]\n        end\n        set [in air v] to [0]\n    else\n        set [sx v] to [0]\n    end\n    change [y v] by (-12)\n    repeat until <not <touching (platform v)?>>\n        if <(sx) > [0]> then\n            change [x v] by (-1)\n        else\n            change [x v] by (1)\n        end\n        Position\n    end\nend\n\ndefine Game Die\nset [exit v] to []\nrepeat (5)\n    hide\n    wait (0.1) seconds\n    show\n    wait (0.1) seconds\nend\nhide\nwait (0.5) seconds\n\ndefine Test Die\nif <touching (danger v)?> then\n    set [exit v] to [Die]\nend\n\ndefine Game Win\nrepeat (50)\n    point towards (exit v)\n    turn right (65) degrees\n    move ((distance to [exit v]) / (2)) steps\n    change size by (-1)\n    change [ghost v] effect by (2)\nend\nchange [level v] by (1)\nwait (1) seconds\nhide\n\n@PLATFORM\n\nwhen I receive [green flag v]\nhide\n\nwhen I receive [tick v]\nPosition ((X) - (SCROLL X)) ((Y) - (SCROLL Y))\n\nwhen I receive [setup v]\nhide\nset [x v] to [0]\nset [y v] to [0]\nif <(LEVEL) = [1]> then\n    switch costume to (level 1 1 v)\n    Clone at X: [420] Y: [0]\nelse\n    if <(LEVEL) = [2]> then\nend\n\ndefine Position (x) (y)\ngo to x: (x) y: (y)\nif <<(x) = (x position)> and <(y) = (y position)>> then\n    show\nelse\n    hide\nend\n\nwhen I receive [reset v]\ndelete this clone\n\ndefine Clone at X: (x) Y: (y)\ncreate clone of (_myself_ v)\nchange [x v] by (x)\nchange [y v] by (y)\nnext costume\n\n@COLLECTABLES\n\nwhen I receive [green flag v]\nhide\n\nwhen I receive [tick v]\nPosition ((X) - (SCROLL X)) ((Y) - (SCROLL Y))\nif <touching (player v)?> then\n    change [collected v] by (1)\n    delete this clone\nend\n\nwhen I receive [setup v]\nhide\nset [collected v] to [0]\nset [collected maximum v] to [0]\nset [x v] to [0]\nset [y v] to [0]\nif <(LEVEL) = [1]> then\n    switch costume to (coin v)\n    Clone at X: [142] Y: [-13]\nend\nset [x v] to [-9999999999999999999999999999999999999999]\n\ndefine Position (x) (y)\ngo to x: (x) y: (y)\nif <<(x) = (x position)> and <(y) = (y position)>> then\n    show\nelse\n    hide\nend\n\nwhen I receive [reset v]\ndelete this clone\n\ndefine Clone at X: (x) Y: (y)\nset [x v] to (x)\nset [y v] to (y)\nchange [collected maximum v] by (1)\ncreate clone of (_myself_ v)\n\n@Blank\n\n@DANGER\n\nwhen I receive [green flag v]\nhide\n\nwhen I receive [tick v]\nPosition ((X) - (SCROLL X)) ((Y) - (SCROLL Y))\n\nwhen I receive [setup v]\nhide\nset [x v] to [0]\nset [y v] to [0]\nif <(LEVEL) = [1]> then\n    switch costume to (level 1 1 v)\n    Clone at X: [420] Y: [0]\n    Clone at X: [420] Y: [0]\nelse\n    if <(LEVEL) = [2]> then\nend\n\ndefine Position (x) (y)\ngo to x: (x) y: (y)\nif <<(x) = (x position)> and <(y) = (y position)>> then\n    show\nelse\n    hide\nend\n\nwhen I receive [reset v]\ndelete this clone\n\ndefine Clone at X: (x) Y: (y)\ncreate clone of (_myself_ v)\nchange [x v] by (x)\nchange [y v] by (y)\nnext costume\n\n@EXIT\n\nwhen I receive [green flag v]\nhide\n\nwhen I receive [tick v]\nPosition ((X) - (SCROLL X)) ((Y) - (SCROLL Y))\nif <(COLLECTED) = (COLLECTED MAXIMUM)> then\n    broadcast (OPEN PORTAL v)\nend\nif <touching (player v)?> then\n    if <(costume [number v]) = [2]> then\n        set [exit v] to [Win]\n    end\nend\n\nwhen I receive [setup v]\nhide\nset [x v] to [0]\nset [y v] to [0]\nif <(LEVEL) = [1]> then\n    switch costume to (closed v)\n    Clone at X: [9999999999999] Y: [0]\nend\n\ndefine Position (x) (y)\ngo to x: (x) y: (y)\nif <<(x) = (x position)> and <(y) = (y position)>> then\n    show\nelse\n    hide\nend\n\nwhen I receive [reset v]\ndelete this clone\n\ndefine Clone at X: (x) Y: (y)\nset [x v] to (x)\nset [y v] to (y)\n\nwhen I receive [open portal v]\nswitch costume to (open v)\n\n@Sprite1\n\n