Not if you're trying to make a playful app design like the author is doing. This design is halfway between a normal application and a game.

I would do silly things like clickable image views to get the style right if buttons don't provide the necessary customisability, were I in the author's position. I don't think anyone would be happy with that.

I'm all for platform consistency, which there is very little of these days, but for every API you restrict someone will find a good reason to work around it and that's where the ugly hacks come in.