A very nice write-up about the never-released Hard Vacuum RTS game http://lunar.lostgarden.com/game_HardVacuum.htm

And, in excellent timing for LD25, the artwork is up for grabs!

Jam entries can use existing artwork etc.

And recently Command&Conquer was ported to HTML5 http://www.adityaravishankar.com/projects/games/command-and-conquer/

Surely all the pushing and hinting you need, right?