I updates the engine for all platforms to newer version (Windows / Linux / Mac). Today I should upload files.
Maybe the butler (https://itch.io/docs/butler/) uploaded something wrong. I apologize for the delays, but Airem is a one-man studio. And I'm still working on 11 projects ... :D. If not, I will sned message to Itch for refunds.
At the moment, if you have Steam, I'll give you a Steam key (but send me e-mail or join to my discord.gg/Airem).
I will also upload files for Mac for Itch.