Developer's Note: There's a lot I didn't get to make during the 1-week jam, but the game should still offer plenty of engaging gameplay and replay value. I know this because I also spent too much time playing and enjoying it instead of working on adding other planned features.
The settings menu and the quit button on the title screen don't work, but you can press ESC any time to quit.
What I didn't get to: There is no ending (if you reach zone 12), no mysterious onion general boss, and no leveling up like I had originally planned. There were also 2 other very cool enemies I made but they didn't make it into the final build for the jam (the chili pepper and the garlic enemies). And I didn't test really beyond the third battle zone. The artillery/mortars don't do any damage to the player - they just alter the ground/trenches, making it harder to follow the trenches. I didn't get to make the razor wire obstacles and sandbags, or shovels/grenades to slowly dig/blast your own trenches. If I get to work on the game after the jam, that's the to-do list.
It's very playable though even though there's no final victory condition implemented yet. (If you make it to zone 12, I'd consider that a victory, based on the background story. I've only made it to zone 4 before the onions defeat me.
Replayability: The game allows for different approaches to dealing with the enemies and the trenches. Try all 3 character archetypes - they're all different from each other. Try sneaking (shift key to toggle) up behind the enemies and shooting them. Try using the bullet time / slow motion (right click to toggle). Try running across the exposed top of the battlefield to take shortcuts. Try exploring the depths of the proc-gen trenches.
I forgot to remove this, but you can press the 'C' key to create extra craters dynamically. Have fun!