I think I know what we're doing now!
This would probably be a game for two local players, unless somebody out there is ambitious enough to do AI or online multiplayer.
Basically, the objective would be to stick knives in the posts on the opposite end of the field. Each post can hold, say, two or three knives. Anything else bounces off the already-stuck knives -- so there's a maximum number of possible points that can be scored. Maybe a match is divided into two or three rounds, and each round is timed.
Players would be able to deflect oncoming knives with their own, so as to defend their posts.
Hitting the opponent directly with a knife is a foul (free throw or something like that), but injuries are sustained (injured people move slower and throw with less accuracy), so players could elect to play by an alternate strategy of trying to harm the other player just slightly in order to have an advantage overall. If somebody is injured too much and is incapacitated, however, the other player is disqualified and forfeits the whole match.
I'd like to make the bare-bones game first, but make it highly polished, with all the shadows and footprints and suchlike you see in the mockup, full audio (including voices for the characters?), et cetera
Beyond the competition, though -- assuming the game is fun enough we want to keep working on it -- it would be cool to add more characters, different knives with varying attributes (speed, accuracy, ease of deflection), doubles matches, and things like that.
I'm going to keep working on visual assets, but obviously if I don't find a programmer this game won't actually happen. If anyone is interested, let me know!