The colour manga image is from Love Deficiency by 24BEEE while the grayscale one is from Mizutama Puzzle by Shoko Hidaka. Tap on the padlock icon at centre of the watch face to lock or unlock the tap actions. Tapping on the 12 oclock will switch between the 2 images. Tapping on the date, 1 oclock, 3 oclock, 4 oclock, 6 oclock, 8 oclock and 9 oclock will launch the calendar, Google Fit or Samsung Health, messages, music, timer, weather and world clock apps. Tap actions were tested on a Samsung Galaxy watch and may not work on other smartwatches. If the tap action for timer does not work because there is no timer app in your Samsung watch, please try installing the free timer app from Samsung Electronics. The tap action should work once the timer app is in your watch. The app can be downloaded from Galaxy Store under the watch apps category. Thanks to moofdadogcow for sharing the code for Touch Lock in Reddit.