PathSlider

PathSlider is designed for mobile, and is free with no ads or in-app purchases.

I recommend you play it on iOS or Android

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PathSlider is a minimal puzzle game that is easy to pick up and play, but finding the best solution can be harder than you think. Slide to the gold to win, but you can only change directions when you hit a wall.

The game is perfect to play in short sessions, but with over 200 levels it will keep you entertained for hours.