Convoy Bomb is a game originally for Sinclair ZX81 in ZX FORTH by Artic, but now in GForth using XTerm (or similar) with Unicode. You also need semigraphics. How to install and run in Linux:
sudo apt install gforth
git clone https://github.com/mobluse/semigraphics
git clone https://github.com/mobluse/convoy-bomb
cd convoy-bomb
gforth convoy-bomb.g.fs
convoy-bomb
show-cur ( if you terminate using Ctrl+C )
bye
Convoy Bomb is in Swedish; both instructions and code. Use without Caps Lock or Shift. B drops a bomb. N/L means New Line i.e. Enter AKA Return. ZX81 does not have ÅÄÖ, but I used 0 for Ö on ZX81 (0 looks like Ø (Danish Ö) on ZX81), but in the GForth version I now use ÅÄÖ in the text and comments.