Great news - I had some time to upload a (very first) version of SPT! You can donwload it in the downloads-section, currently Windows only.
There are a lot of things working in this version, but also a lot of things which doesn't. So be lenient if you find some weird things - if you discover some really bad bugs/crashes/things get stuck, you can report a bug in the game.
I really would appreciate if you guys could give me some input on general gameplay mechanisms - I am not really happy with the whole "create your pizza" gamplay. It is not really demanding or fun in my eyes, so if you have any ideas on how you would change the game to make it more fun, please let me know! (forum or comments or whatever you like).