itch.io

1. Give execution permission:
   • Open the Terminal app on your Mac.
   • Type chmod +x (make sure there is a space after the x).
   • Drag the game application file (.app) into the Terminal window and press Enter.
2. See about the "Quarantine" attribute
3. Launch the game by right-clicking the app and selecting "Open".

=>for step 2, type ‘xattr -dr com.apple.quarantine’, do a space and then drag the file here again

Hope you succeed ^^

Same with my Mac T_T Even if I allowed it to open in my settings, the game won't open... Did you managed to open it ? 

Edit : thanks to the creator and klolol7 comments I managed to open the game !! I CANT WAIT TO PLAYYY ^^