Use a MIDI controller with faders and buttons to run the show without the mouse.
Suggested controller: the Korg nanoKONTROL2. It is small and low in cost, and it has 8 faders, 8 knobs and many buttons. It connects with one USB cable and needs no driver.
Plug in the controller, at any time. The Desk tab, under MIDI, shows its name.
Right-click a control on the screen and choose MIDI Learn.
Move the fader or press the button on your controller. Done.
Right-click PLAY on player 2: MIDI Learn.
You can map:
each player's PLAY, STOP, DUMP and PFL, and its fader,
each cart and its fader,
MARK, TALKBACK (held), STOP ALL and RECORD.
Right-click a cart for its MIDI menu.
The right-click menu shows what a control is mapped to now. Clear MIDI removes it.
The last control you moved shows on the Desk tab, under MIDI. Use it to check that the controller works.
The map is kept on this computer, for every show. A cart's control plays that cart position (for example cart 1) on whichever deck is up.
Use Currycaster's MIDI map copies the map of the original Currycaster app, if you have it.
A Stream Deck works too, with a MIDI plugin that makes its buttons send MIDI.