The planned features for Silent Running can be found on the project's roadmap If there's something you want, feel free to make an issue for it.
There are no releases of Silent Running currently. The first release is expected to be for version 0.3.0!
To run the current state of the code, you'll need LÖVE. You'll also need the current code.
If you're on windows, you can drag the src folder onto the LÖVE executable.
If you're on linux, you can run love path/to/silent-running/src from the terminal.