Verify that You have rustc and cargo available (preferrablly a full Rust development suite). Download the game, open the containing directory in a Unix-compatible terminal and use "cargo run". Please also note that some terminal emulators work fine while others do not. Unfortunately there is no way to know beforehand other than by trying.
Game by Aleksanteri Reijo and Joonas Reinholm. Thanks to the developers of Rust and external crates. Special thanks to Brian Walker for inspiration.