Mekorama 4+

This is really a great and beautiful game which inspires your mind and imagination on the unseen to move a broken robot across different terrains.

Game is free and payment to support the developer is voluntary.

Great game; great developer!

This puzzle game is a suitably challenging puzzle game with unique gameplay elements, and nifty features such as the ability to create user-generated levels with its included level editor.

But it is not without flaws. The uniqueness of the game is often marred by less than ideal execution and controls. Quite a few puzzles are somewhat frustration-inducing, not because of their truly challenging difficulty or clever level design, but instead, poor controls that require you to just try executing a move over and over and over again, long after you already figure out the puzzle.

In addition, some of the puzzles are rather poorly designed, disguising obscurity as difficulty. In other words, there are "challenging" puzzles that are difficult to completely solve because parts of the puzzles are simply not visible. You just have to randomly try things out and hope that with some dumb luck, the puzzles will solve themselves - and often they do, because once the obscurity is removed there is virtually no puzzle remaining to solve.

Nevertheless, this game shall appeal to puzzle game enthusiasts looking for unique game with some replayability, provided that you can look past its flaws and the occasional frustrations that come along with them.

PS: no, this game doesn't resemble Monument Valley; the core gameplay mechanics are really different from that of Monument Valley.

Recent updates made the game ad-supported, which means there'll be ads around every corner, even when offline (the developer hard-coded ads for his other games within the game. Sure, they're short-lived, but they're still there, wasting 5 seconds each time, which adds up.).
It doesn't help that the recent addition of the "Master Levels" makes this game more greedy than it should be—the master levels may be very well-designed for the most part, but most of them seem to be "retry farms", ie. created with the sole purpose of making the player have to retry over and over again, because the level design makes trial and error mandatory. This obviously translates to more ads being ran, because ads pop up for almost every retry and level cleared. I sure hope this wasn't the developer's intention with the master levels, because if not, that's just an underhanded way of getting more ad revenue.