Feature Request Change play button on entering play mode

When play testing my game I often use "pause" button. But sometimes I forget that I have to press the same button to unpause the game and so I press "play" button instead, which exits play mode. I think it's not very intuitive to press "pause" to unpause.

I suggest to change "play" button from triangle to square on entering play mode to make it a bit more intuitive. Something like this would be great