In the provided text, there are no actual word search grids or hidden words to find. The text describes features of a word search game, but it does not include a specific puzzle for you to solve. If you are looking for a word search puzzle to play, you would need to access the actual game described in the text.

However, if you're looking for a list of words related to the features mentioned, here are the key words and phrases that could be considered "hidden" within the context of the game's description:

1. Play
2. Friends
3. Family
4. Kids
5. Adults
6. Learn
7. Words
8. Vocabulary
9. Train
10. Brain
11. Concentration
12. Thinking
13. Memory
14. Clues
15. Hidden
16. Secret
17. Letters
18. Settings
19. Progress
20. Pace
21. Difficulty
22. Levels
23. Language
24. Translation
25. Protect
26. Eyes
27. Dark
28. Mode
29. Discover
30. Languages
31. English
32. Spanish
33. French
34. Portuguese
35. German
36. Italian
37. Wherever
38. Whenever
39. Home
40. Public
41. Transportation
42. Waiting
43. Room
44. Finish
45. Later
46. Autosave
47. Define
48. Colors
49. Animations
50. Sounds
51. Vibrations
52. Devices
53. Phone
54. Tablet
55. Chromebook
56. Computer
57. WIFI
58. Internet
59. Connection
60. Offline
61. Compare
62. Best
63. Times
64. Rankings
65. Earn
66. Achievements
67. Points
68. Google
69. Play
70. Games
71. Account
72. Logged
73. Updates
74. Version
75. Latest
76. Constantly
77. Improving
78. Miss
79. Activate

As for the "secret word," since there is no actual word search puzzle provided, there is no specific secret word to find within the text. If you were playing the actual game, the secret word would be determined by the remaining letters after finding all the listed words, as mentioned in the feature description.