when the keys are Just Pressed

docs/modchart.md

@@ -116,6 +116,7 @@ Current calls to functions include,
 | update  | Elapsed frames |       Gets called every frame (after the song starts)       |
 | stepHit |  Current Step  | Gets called when ever a step hits (steps are in between beats, aka 4 steps are in a beat) |
 | beatHit |  Current Beat  |              Gets called when ever a beat hits              |
+| keyPressed | Key Pressed | Gets called when a key just got pressed (up, down, left, right, accept) |