objects/oGame/keypress_M.gml
From spelunky.gmk, Spelunky Classic 1.1's source, © 2008, 2009 Derek Yu and Mossmouth, LLC, shown whole under the Spelunky User License v1.1b. Extracted by spelunky.ai's tools, an unofficial fan project, one file per script or event; the // ==== lines are the extractor's, naming each action of the event. Some scripts are others' work that Derek Yu credits in the source's readme.txt: Martin Piecyk's platform engine, ChevyRay's view scaling scripts and tsg1zzn's Super Sound System.
oGame's keypress M event, 22 lines of GML.
if (global.music){ global.music = false; stopAllMusic();}else{ global.music = true; if (isLevel()) { if (global.levelType == 1) playMusic(global.musLush, true); else if (global.levelType == 2) playMusic(global.musIce, true); else if (global.levelType == 3) playMusic(global.musTemple, true); else if (isRoom("rOlmec")) { if (oPlayer1.active) playMusic(global.musBoss, true); } else playMusic(global.musCave, true); } else if (isRoom("rTitle")) playMusic(global.musTitle, true);}