Running an .exe file to play is not mandatory - a program to monitor the game, enough to know the server's wallet and own the personal wallet.
Main thing the player remain all funds the player wallet.
In other words, players are unable to see the game without downloading the software so it sounds like a blind betting. I doubt this type of dice games will attract players, no offense but just saying.
The other thing is that you use 999dice algorithm which is a well known rigged dice site. This will make more people think so many times before decide to play on your game.