Easy "A new look" achievement
Complete a few puzzle sets and get some triangles to unlock an option to change the palette at the bottom at the main menu, on the left side.
Easy "Daily - 1", "Daily - 3", "Daily - 5", and "Daily - 10" achievements
Change the date on system. The sets are generated locally and not online. That daily sets' difficulty always use the following pattern:
Monday: Easy
Tuesday: Mild
Wednesday: Regular
Thursday: Complex
Friday: Demanding
Saturday and Sunday: Random difficulty
Thus, if you have problems solving the puzzles, only complete the Monday or Tuesday puzzles.
