If you subscribe now, you'll have access to the release version.
If you've paid more than 10-18 cumulatively on Patreon/Subscribestar, you can ask for an Itch key as well.
what is the different? with the key you have access to all following updates?
Yep, you have permanent access to everything on this page, while with Patreon/Subscribestar you only have access while you are subscribed.
i have the 3,50 euro subscription can yo usend me the key?
Should I write to you somewhere else like on Discord?
Discord or Patreon, both work.