run as administrator for the program to pickup inputs while minimized

while in streamer mode press F12 to switch tabs WHILE TBFTRAINER IS FOCUSED J K N M are the score controls for streamer mode

to change metronome speed you need to toggle (turn off and on) the checkbox after changing speed

to change any controls you'll need to edit the source and rebuild the project however, any control format that isnt WASD and shift for flip + right click for block is objectively wrong