Changing color palette doesn't take effect on "Planet Putt Putt"

[Sheila111]

Describe the bug
Changing color palette doesn't take effect on "Planet Putt Putt"

Steps to reproduce the behavior

1. Navigate to https://arcade.makecode.com/beta#
2. JavaScript Games---->Planet Putt Putt---->JavaScript Open Example
3. Switch to Assets Editor
4. Click 'Colors' and change color palette to Grayscale

Actual behavior
Changing color palette doesn't take effect on "Planet Putt Putt"

Expect behavior
Changing color palette takes effect on every game

Screenshot
Changing color palette doesn't take effect on "Planet Putt Putt"

Changing color palette takes effect on other game

Additional context
1.OS: Windows11
2.arcade version: 1.13.11
3.Microsoft MakeCode version: 8.6.14

[abchatra]

@kimprice interesting bug.

[kimprice]

This game uses the color-coded-tilemap extension, so I'm guessing that's causing a conflict.

[abchatra]

Legacy won’t fix

[jwunderl]

This ones not a bug but there's an improvement we should consider making -- the reason it's not applying the palette is not due to the color-coded-tilemap extension but because it changes the palette at runtime (in https://github.com/microsoft/pxt-arcade/blob/master/docs/javascript-games/planet-putt-putt.md search palette)

This one has two that it switches between for title screen and 'gameplay' so it doesn't matter too much, but it's probably worth considering adding a snippet type to docs like

```palette
123456
abcdef
...
```

that would set palette in pxt.json so that we can author simple examples with different palettes that are still 'editable'