PUSH is a neat little puzzle game with a simple, clean aesthetic that follows a pattern I've seen with iOS puzzle games these days; Start with a very simple mechanic, get a few levels with that mechanic, then move on to another mechanic and repeat that pattern. Sometimes you overlap two mechanics together, but most of the time they are lost after you encounter them and go through what they mean. It's a nice way to make sure you don't repeat the same puzzles over and over, but at the same time you also need to come up with a bunch of puzzle mechanics. PUSH managed to do it pretty well!
The only 'real' mechanic in PUSH is, aptly, pushing buttons. You start with very simple levels where you just push buttons and win, then you have to push buttons that have the same symbol on them, then you rotate the puzzle around to find buttons, then you need to alternate between white and black buttons, the list goes on. All done in an extremely minimalist puzzle style with almost no UI and very little feedback. It's a bit annoying sometimes, especially in the later puzzles where you just fail and don't see why because things aren't super clear. But overall, they're good puzzles.
There's not much to say about PUSH, after a while, you get a great string of arrow-based puzzles where you need to follow them to figure out which button you have to press next, but that's pretty much the end-game. I had a great time with it, and as far as puzzle games go, it's up there in the ones I've finished!