The developer has changed from Googoleplex Ltd. to Hayashi Koichi's own business.
This is why the support URL has been changed.
Source: Apple App Store listing.
Screenshots
About this game
Koikoi is a casual puzzle game focused on matching elements to clear the board. Players can enjoy short, relaxing sessions with a fair freemium model. The game is designed for easy pick-up-and-play, making it suitable for quick breaks.