Fer random fixes

[fernperezg97]

• StoriesLandingPage.tsx/ StoriesLandingPage.scss
  • Edited the alignment and padding
  • Edited placement of Bili depending on screen sizes
• PlayHeader.tsx/PlayHeader.scss
  • Fixed overlay
• StoryFactoryCongrats.tsx/StoryFactory.scss
  • Added 'horizontal bounce' animation to arrow
  • Fixed stars overlay so that no stars cover any text
• Animate.scss
  • Added 'horizontal bounce' animation to use for congrats page arrow