This question interests me as well because I have recently run into the same issue (while trying to calibrate the Pong tutorial game - https://forum.getready.io/t/pong-feeling-retro/1990 ) and because it is one of the classic issues for web developers.
@Ready here’s a question for you, mostly just for my own curiosity : would it be technically feasible to support platform detection in the Ready engine i.e. by offering event conditions something like System/Platform/{mobile,mac,windows,web}