I know you offer the game here with a Steam key, but many purchase their games on itch.io because they are not fond of Steam and its DRM measurements. I think if you sell your game here you should look after it in the same way you do it on Steam. I know that the update procedure on itch.io is more complicated than on Steam, but I also think that people who pay the same amount of money deserve the same treatment. Otherwise it would be better to abstain from selling a game here until it's completely finished.