Todo:
[ ] link people socials
[ ] have a nice animation at the website launch
[x] have onboarding stuff
[x] have changelog
[x] new option: grid size (multiply the image object width and height at line 35) with a slider
[x] new option: hud opacity
[ ] let people build second look from the website
[x] mark all seen at app close option
[ ] at site's root, show every second-look and today's gallery link