I really like the simplistic art style and intuitive game play. In general, really nice and clean UI design. For my taste the ads are a bit too intrusive - I don't like full screen ads that cannot be closed immediately, but that's more of a personal preference. My only problem with the gameplay itself is that some basic moves feel repetitive after a while (e.g. shifting a stack by one field).

Pros:
- graphics are nice
- gameplay is easy to learn
- game explains itself
- simple controls

Cons:
- ads sometimes overlay game menu buttons at the bottom
- initial loading times are a bit too long for a casual game
- gameplay starts out a bit too slow for my taste

Thanks for taking the time to play and write this thorough feedback. I'm glad you're having a good time while playing the game!

That's actually a great idea for utilizing the free space left and right of the game board. You're right that this kind of tutorial is not something the typical casual gamer will want to go through in order to learn such a simple game. It should do a better job of explaining itself.

I originally planned to do the classic three-letter name thing for the highscores (good old times ;-)) but then went against it, because I find it highly unlikely that the player will share their device with some other player, so most people will just enter the same letters all the time. But maybe this is just a small detail that reminds players of how things were done in the past, so I might add this just for this effect.

Regarding the achievements, I wanted to put an explanation of how to get to each level into the achievement menu. The description text is already there, so it's just some menu design. Should be easy to do. The more complicated thing will be motivational pop-ups (or something similar) that continually remind the player of how to get to the next achievement without having to look it up in the menu.