I couldn't seem to get past the tutorial screen on Windows? Tried Enter, clicks, various keys; Esc closed the game. A shame because the art looks incredibly and I'm a bird nerd.
Maybe try to press the "X" button at the top right corner of the page? Ideally the panel would be closed by that. If you encountered more issues, feel welcome to reply! Thx!
Oh my God I must just not have clicked precisely enough. 🙃 Went back to it and gave it a proper try! Shockingly hard but great art and unique take on the theme!