I'm using a custom font and admob in my game but they don't work when I export my game with Crosswalk.
Use spritefont+ http://spritefontplus.codeplex.com/
Tutorial: https://www.scirra.com/tutorials/716/us ... ont-plugin
Not sure what to tell you about admob tho.
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It seems it doesn't work for android.
Admob works using cranberrys plugin