Hello Furkanakkurt.
As a pixelartist myself I suffered a lot of the Adobe high prices for artist tools :( ... That is not my intention, I do want my tool to be afforable for artists like me, So, when I will release on Steam I will point out to everybody that if they have been purchased the app on itch will have a Steam key... Not sure how can I do that to automate it, but I will find the way... Many Thanks.