I'm halfway through making a game for Ludum Dare 29 . The theme this time around is "Beneath the Surface". For once I've had an idea right from the start that's practical, fun and in keeping with the theme. It's a lovely change from my usual pattern of starting with an idea that turns out to be impractical or boring & having to start over halfway through the competition. So on that basis alone I have high hopes for this one. Here it is: Project Tethys It's an underwater shoot-and-rescue-em-up inspired by the likes of Defender and Resogun . You control a state-of-the-art combat submarine tasked with defending an underwater research facility from an invading army. Or at least, that's what it should be if I can finish it in time... The controls are arrow keys or WASD to move, left mouse button to fire. There's still loads left to do: implementing the rescue mechanic; sound effects; enemy AI; a high score table; a menu system; better model...