He's my (late) entry to Ravuya's "1 Week, 1 Button 2" contest(due to having irregular internet access). This is the cumulation of 10 hours work as I ran out of time! There's no sound and the graphics are lame - it was funny at there at 11pm last night hacking in the 'menu' screen and extra levels. I'll be following it up at some point with a more feature complete version, including sounds and better graphics - there will also be a dreamcast port too as the code is easily portable.
For those that are interested, I've supplied the source code. It's written in C and was derived from evoInvaders 0.1. It's pretty funny as the grubs that you drop to feed your chicks are called "weapons" in the code, simply because of its heritage. The code base started getting sloppy as I ran out of time, but it's not too bad and is pretty extendable.
All in all, this was a lot of fun to do. I knew I'd not have enough time to complete the game as much as I'd hoped but it was fun to throw something out in this sort of time. As I said, I like the basic idea of this game so will work to expand it at some point :)