Excel slot simulator (UK-21's Fruity Frolics!)
Something I conjured up a few years back as a coding challenge - a virtual slot/fruit machine created using Microsoft Excel®. I did this largely as a coding exercise and to replicate the method (albeit in a simplified form - my one has just three reels each having 21 symbols) of how a modern, RNG based, slot/fruit machine functions and how the underlying maths around the RTP (Return To Player) work.
This one comes complete with tumbling reels, a results recorder, a widget to allow automated simulations to be run and a sheet containing calculations that validate that the incidences of the random numbers generated fall within statistical norms. You can also amend the pay-table, and by doing so see how the RTP is affected as it automatically recalculates itself based on the revised payout amounts you enter.
I created this on what is now a ten year old, 4Gb RAM, laptop that allocates a proportion of its RAM to drive the display and as a consequence, as it doesn't have a dedicated graphics card installed, the tumbling reels do run somewhat slow and clunky. If you experience the same issue simply exit all unnecessary applications and just run Excel, and the file, alone in order to free up as much memory within your system as possible.
Here's a screenshot . . .
Here's the file to download if you fancy giving it a run out. Enjoy with my compliments!