In this Tutorial in the Attached File fully commented , you will learn how to make a Slot Machine in Construct 2 and 3 for your Game ! This use a probability ta...
I maked a test with 6 different symbols, and with your wining method is nearly impossible to make a match 3.
More symbols=more difficult to match=bad wining method
Yes you are right , if you only have 6 different and no repeating frames its almost impossible to match 3, so you must add more Iqual frames as you want to match more Ex: Add 6 different frames and add 6 coins too , total 12 frames ! Abraços