Game developers have just announced the redemption codes to submit. However, there are no codes for now but they will give redeem codes soon. When you submit this redeem codes, you will have bonus rewards.
Update:
By watching developers' twitch stream, you can get redeem code and get various awards in game. Follow their subreddit and twitter to get information about twitch live streams.
Update 11.21.2017:
You can get redemption codes by watching Non-Pro Country Matches on Twitch. However, you will need to be hurry to enter the code, because there is a limitation.
You will have plenty of gems and golds with these codes. Also, you can have much more awards by logging in the game.
Don't forget to log in on 26th November to get Superman hero for good.
Update:
By watching developers' twitch stream, you can get redeem code and get various awards in game. Follow their subreddit and twitter to get information about twitch live streams.
Update 11.21.2017:
You can get redemption codes by watching Non-Pro Country Matches on Twitch. However, you will need to be hurry to enter the code, because there is a limitation.
You will have plenty of gems and golds with these codes. Also, you can have much more awards by logging in the game.
Don't forget to log in on 26th November to get Superman hero for good.