As the theme of the libgdx jam has been announced, "Life in space", I'm just going to write down some ideas for my game:
- Screen/space bounds. Going beyond them and you will die
- Controls: simple tap or "line drawing"?. Perhaps limited "ink" for the drawing?
- Non-static background.
- Collectable items during the game?
- Main character: humanoid or kind of a ball?
- Increase game speed
- Infinite game. Unless you die, the game continues.
- Score according to the time being alive.