Super 6 Digital Slot Machine
I am building the Super 6 Digital Slot Machine in VB6. It is presently in an alpha state. 
WinBoards readers get Early Access to build 4373!
https://mega.nz/#!V5FjEA6I!VqCh1IccrcwIx18uw900sH7iji0842mA_UxAmghtDqM
The basic functionality is in place, and a new set of builds with advanced functionality (including the removal of the redundant "end" button and a count of the current fiscal balance - which is still buggy) has been forked off this basic, stable version.
The final version should be released in Q3 2024. If I get into law school, then it may end being pushed back to Q4 2070, or if I flunk everything as a result of focusing on this toy, Q3 2020.
I don't think microtransactions would work very well, but maybe SAAS would do. Get people to repurchase it every month! 
Comments
I've been wanting to build my own version of Slingo. Haven't gotten around to it though.
I've made further progress, including significant graphical improvements and have discovered that I needed to make my variables public to allow for counters to function. I have now compiled build 1.00.4513.
But I've noticed that random number generation in VB isn't so random. In a sequence of several stress tests, I keep getting the same sequence of numbers and attain the first prize at the same point every time.
I've added an element of randomization to the number generation, using system time and date.
So another release should be coming soon. How does early March sound?
I might even recompile it in VB3 for win3.x users.