Great ideas. Thanks guys! If I do build it full 3D with a static camera, wouldn’t the cursor be grabbed by the engine on game play? Apologies for asking such noobish questions 
And I agree with you @Astrotronic it does sound a bit overkill thinking about the basic functionality of a slot machine, but I just wanted to see if it is physically possible to build such a thing. I’ll take all your input, digest it for the next couple of days and I’m sure I’ll be back with more questions 
Oh, and for the communication I do not need a keyboard input. Just mouse click on the 3d button, or touch on mobile.