Hi!
I´ve tried it and I just wanted to stop three numbers in a row but it lacks something. I don´t know its just too simple, try to add something to give variations, like a 2, 3, 4 combination o similar.
Also, after several games you catch that feeling over stoping numbers, make spinning random. Try to put some fruit sprites to give a little more color. Music would not be bad.
Hope it helps.