Better on browser
I really enjoy this game on browsers, but the iOS version is not as good. The iOS version is like a webview running inside Unity - so it will drain your battery and warm up your cellphone like any Unity game. I fell asleep with my iPhone charging while playing it and (not long after) I woke up with my phone hotter than I ever felt it before. The game also takes it time to load (another issue exclusive to mobile). So it is not as casual as its web version. And finally, looks like there are features and bugs specific to this version. I got to "Artefacts" - which I never got in the web version - and clicking on that gave me the classical Unity stack trace.