What is the PUSH game, how does it work?

According to the introduction of Rainbow Train, PUSH is a Puzzle game on the Android platform. There is currently a 1.13 version released on Sep 21, 2018, you can see the details below.

PUSH is filled with a lot of different puzzles to solve.

Like our previous games, its intended to be a relaxing experience, thus there are no points, stars, tutorials, move counters.
Your goal is to push all the buttons.

How do you do it? Well, thats the puzzle...

What's new in version 1.13 bug fix