Update SUMMARY with current reference APIs. (#507)

docs/reference/game/change-score-by.md

@@ -1,27 +0,0 @@
-# Change Score By
-
-Add the amount you say to the score for the game.
-
-```sig
-game.addScore(1)
-```
-### Parameters
-
-* a [number](/types/number) that means how much to add to the score. A negative number means to subtract from the score.
-
-### Examples
-
-This program is a simple game.
-Press button ``A`` as much as possible.
-At the end of 10 seconds, the program will show your score.
-
-```blocks
-input.onButtonPressed(Button.A, () => {
-    game.addScore(1)
-})
-game.startCountdown(10000)
-```
-
-### See Also
-
-[score](/reference/game/score), [start countdown](/reference/game/start-countdown)