Game will crash when solving level 19 or 20 (depending on how you count the levels as one of the earlier levels didn't seem to give an achievement), could you please look into fixing this dev?

1. Achievement for finishing Puzzle 31 is not unlocking. 2. Puzzle 39 is a duplicate of Puzzle 35 and appears to not be finishable after putting it the pieces in the right position (i.e. Puzzle 35). So the user cannot advance to puzzle 40.

I completed the game but four achievements are still locked: Finish Level 23 Finish Level 26 Finish Level 28 Finish Level 30 It's frustrating because you can't replay the puzzles.

Can't find them in the game, soo, where are they?

When I completed Level 3, there was no achievement unlock. When I completed Level 4, the Level 3 achievement unlocked instead of Level 4. Then completed Level 5 and it unlocked Level 4. So the achievement unlocks appear to be off by 1 after Level 3.