Version 1.0.0 release of The Lost Tommy for Windows, Linux, Apple and browser.
Troubleshooting
The game executables are safe but unsigned, so this might happen:
Apple
You get the error "tommy.app is damaged and can't be opened".
Solution: remove the app from your quarantine list using xattr -d com.apple.quarantine tommy.app before running.
Windows:
Microsoft Defender is preventing the program from running.
Solution: Click "Run anyway".
Linux:
There should be no issues.