i have 297 / 298 achievements, all levels are completed, it says " hidden achievement " is missing,,, where / what is the hidden achievement please ?

All Levels Completed Achievement triggers whenever you return to the game after completing 1 or more levels, if you don't sit through an entire playthrough and beat all levels, if you even only complete 1 level then leave, when you reopen the game next time the achievement will pop up as if you completed all levels, I tested this on the Undersea as well, while I can't check the other games since I complete them in a single playthrough, these 2 triggered the achievement in that way, so I'm just going to ass...

hi i have a 75% coupon for this game till 24-02 trade me its free

Level #5 contains 11 differences in total, not 10. There are two differences in the horse illustration on the left side of the screen, but only one will register, depending on which difference is circled first. As can be seen in my screenshot, I circled the difference in the horse's face first and so it then became impossible to circle the other difference (the horse's leg). I reloaded that level and circled the difference in the horse's leg and it then became impossible to circle the other difference (t...