Nvidia shield euro truck simulator

Saldawop

Just bought an nvidia shield. Hooping I could play Ets2 on it (I own the game on steam)
Went into Steam and tried to install but wouldn't let me. Nothing happens when I click install.
Then I found the game on the main screen menu (geforce now), and clicked on it. Instantly downloaded 1.1gb of data, and now install button has been replaced by Play. However still nothing happens when I click on it.
If it was unsupported would it even download anything?

Saldawop

Is there something I need to do in order to get it to work?
Ps Says it may need keyboard and mouse, which I don't have yet, but other games have the same message and still load so assume its not that?