This is, without a doubt, the most epic goose battle I have ever participated in. Really impressive tech demo with some mild but enjoyable gameplay.
Even in the web build, things felt super smooth with 40k geese in the game. I feel like for one particular obvious interpretation of the theme, you knocked it out of the park, so full marks there.
The controls were a little wonky for me -- ctrl click on my macbook is a right click. So zooming sort of worked, but was a bit messed up due to the right click menu taking focus. alt would have worked better, or +-, or scroll is fine if there's a way to go fullscreen.
The rest of this will probably get into "yeah, that's a bit obvious, if only we had time" territory:
Double-tap 1 to center on the hydra would have been nice, or camera movement from the minimap.
And I was thinking that a simple timer to display at the end would help this be more like a game, but there wasn't even a win/loss screen at the end.
I still had a good time with what was here though. The concept of a goose hydra is just great.