I got your email : there's indeed no controller plugged in. So I guess we're left with 2 possible culprits : the mouse & the keyboard. (assuming you don't have a program to save & run keyboard macros)
Could you try to unplug your keyboard and launch the game to see if it helps ? If so, it could mean that the game sees the Alt key always pressed down or something like that.
If not, then could you try to unplug your mouse and check the result ? It might be quite complicated to launch the game with only a keyboard, so you can try to unplug the mouse once the game is loading.
Side note : if we don't find a way to fix the issue and you go over 2 hours of playtime and want a refund, explain to Steam what happened and it should be ok. If not, let me know and I'll contact them by myself.
If you have the time, could you try the demo to see if the same issue occurs :
https://www.managames.com/tennis ?