itch.io

en steam te dio un llave ponla en steam y vas a poder jugar

"For now, the game redeems as a Steam key only. That might change in the future, but please keep this in mind."

It is clearly written around the area where you purchase the key. You can redeem the game on Steam. 

If you are unhappy with the purchase, you very well can start a refund request to Itch.io. 

Your inability to read does not make me a scammer. 

Have a good one.