Greetings CodeManu, just bought the software and I was wondering how to get the steam key that was mentioned in the purchase page?

I've also bought Spritemancer and i can't see the button to redeem the steam key

Hi there,

This post explains how to retrieve the steam key

https://itch.io/t/67604/how-to-get-a-steam-key-from-your-itchio-purchase

If i remember correctly from when I activated.
Itch'll request you to give permission to access the steam account, after that it'll give you a steam key to activate the product.
Ad block or popup block can interfere with this prompt and you won't see it.