That being said, if you need help fixing the game - and yes, it is fixable, then just follow these instructions. Note that the solution works for both Windows 8.1 and 10.
1. Download a working copy of the executable file (the .exe) for the game
There are several links that you can use here: (I used the first one)
https://www.sendspace.com/file/wj7rd1
https://www.multifilemirror.com/5p2jbalyraim/Samantha_Swift_and_the_Golden_Touch.exe.html
http://www.datafilehost.com/d/18c757b4
https://1fichier.com/?nm7his36zx
https://www.load.to/rr1krYNM7p/Samantha_Swift_and_the_Golden_Touch.exe
http://dl.free.fr/getfile.pl?file=/Eby1LdXE
https://www.sendmyway.com/gxgmqdmmbm54
http://www112.zippyshare.com/v/5Af7U14E/file.html
https://www.sendspace.com/file/6oklp5
(P/S: I don't own any of the links listed here, and although I'm pretty sure there aren't any viruses or malware, use at your own risk! Just don't click on the pop-ups or ads and you'll be fine I think.)
2. Go to your Steam folder (should be in your C drive by default)
3. Find "steamapps", then "common", and then double-click into the "Samantha Swift and the Golden Touch" folder
4. Copy and paste the downloaded .exe file into the folder above, replacing the existing .exe file
5. If you can't replace the file because the game is still "running", then press Ctrl+Shift+Esc simultaneously to bring up the Task Manager.
6. Click into the "Details" tab
7. There should be TWO processes that the game is running - one is called "Samantha Swift and the Golden Touch" while the other is probably called "game.dmg" (if my memory serves me right)
8. Once you've found them, RIGHT click on each of them and choose "End Process". Once done, wait for a bit before trying to replace the .exe file again.
9. After replacing the .exe file, all you need to do now is to go to your Steam client/interface and click the Play button to play.
** Make sure to NOT verify data file integrity because if you do so, Steam will just replace your third-party .exe file with the faulty one again.
10. After launching the game, there'll be a white screen and your mouse cursor will turn into the loading icon - well, don't panic just yet. Give your PC some time to load the game - the fix should work and the game will automatically start with a cinematic.... after all, it did for me :)
Hope this helps!