I solved all 311 solvable Sokoban puzzles. #53 is obviously broken. The red hole on the right should be deleted to allow any solution. I spent about three weeks off-and-on solving these. Very enjoyable. Thanks for the challenge.What to improve?There are some puzzles that the three buttons partly hide the maze on iPad. Please add a four arrows directional control, and expand the maze to fit the screen size. Fix #53.Update:1. I don’t remember seeing any ads. Use airplane mode.2. Only noise is intentional movement sound effect. Use mute.3. Chip’s Challenge is the original game for Microsoft Windows Games Pack. Flip is a cheap knock-off idea of no adversaries, otherwise nothing newly original. It’s Chip’s Sokoban design that makes Flip a fun game. Chip’s Challenge is stuck in trademark hell preventing its author from re-releasing. Flip’s author is not Chip’s author.

It’s one of those games that throws up the occasional really difficult level, where you have to walk away and come back fresh to solve it. Lots of levels are quite straightforward though, so you don’t feel bogged down for long periods. Edit: I’ve just gotten to Level 53 on the Hard levels and yup, it’s impossible. I’m glad you can skip levels!

Fun puzzle game with elements from Chip’s challenge and Sokoban. With ice, holes, colored blocks, warps, and keys, the game is much more interesting than a typical Sokoban game. The only problem is that hard level 53 is provably impossible (also mentioned by a different reviewer). For that level, I believe the wall immediately above the green hole should be removed (possibly replaced with ice). I wouldn’t let this issue stop you from the game.

They’re very good at making one re-examine one’s assumptions at what should be the first steps to take.However, hard level 53 is impossible to solve.Unless there is a hidden feature, something needs to be fixed for this puzzle.