A LudumDare entry from 2013 that I made with my home-grown hacked-together incomplete "game engine" (excessiveOverkill), the theme was "You get only one".
I didn't know what to make, so I made a side-scrolling game where you have only one life, and you die from one shot or if one rock passes you.
You play as a mechanical space-goat (the goat model from another LudumDare game I made) who has to find his girlfriend (a pink metallic goat) who was for no particular reason transported far away from you......
Linux: LD28_GoatLove_linux_b0021.tar.bz2 5.50 MiB (SHA256:1e91ee49cc3f2f104474fc1125402db9f8bbf9874ca98ccba716a3f6c36e3dbc)
Windows: LD28_GoatLove_windows_b0021.zip 6.77 MiB (SHA256:92479e110c8bdc862322f60aa88f083a8953782db3be1c117bd0cbe6151e9573)
Objective: Shoot everything that comes towards you, avoid hitting anything, avoid anything flying past you.
Controls: ctrl - shoot.
Arrow keys - move your goat (left=slower, right=faster)
esc - quit
f1 - engine console