Could somebody help me and please check if there are any mistakes in English
"Ignatius is an atmospheric 2D puzzle-platform game. The game will soon appear on mobile devices with the android system. It will be release in couple of days and will be for free. So stay tuned and follow us on our social media "
You should capitalize 'Android' since it's a proper noun. I think if you don't capitalize 'Apple' computers, they come after you
'It will be released in a couple of days for free' is a better structured sentence.