I'm also surprised that this thread is dying out already, so here's an unorthodox bump for good measure and a worthy contribution.Warning Forever
It's pretty much a "boss rush" styled shoot-em-up, but with a twist. You start off fighting a small craft known as the "Pure Heart," and, based on how you defeat it, the next boss will have an adaptation in an effort to counter the player's previous attack strategy. This pattern continues until either the player dies enough times or time runs out. This can lead to some dramatically impressive bosses and attacks. You can also set your own favorite ogg or wav as a BGM.
This game was already posted here, but here's a little more description on it.Battleships Forever
This game, on the other hand, is a real-time strategy game using the Warning Forever graphics style and parts mechanic. It makes use of a very wide array of weaponry and unique defense mechanisms to force opponents to alter their strategies of attack. Individual ship parts and weapons can be specifically targeted, as well. It also comes complete with a ship maker so you can custom design your own battleships and deploy them against the opposition.
And a proper full-size image