Weeeell,you can open it by pressing on the file and then click "download" but as of rn,the game is broken on the android
Viewing post in Baldi's Wow Basics 0.1B comments
just double click it and then it would open the file ,after that just double click on the exe file ,a window should pop out And then click on the extract button,wait 10-20 secs,and then click on the exe file again,then a window should pop out again,click on the more info button and after that you can finally play the game