Create a mock-up of a non-violent shooter game - It should be clear that enemies aren't being killed or wounded.
It can be a side-scrolling shooter, a top-down shooter, first-person shooter, it's up to you.
Examples are Splatoon (shooting coloured ink at opponents) and Super 3-D Noah's Ark (feeding animals).
Canvas Size - Unrestricted.
Colours - Max 32.
Transparency - No.
Animation - Optional.
i vote for mrmo, since unrestricted canvas pretty much seals it
i had an idea of Hotline Miami demake where you play as a frendly doctor saving people by giving them cpr and shooting vaccines at them.
we should do monthly challenges too, along with weekly ones.
Quickie google search of SpeedyCube clearly shows you have no friends 
what if my friends are being injured and not my enemies? will that count?
so, to clarify, the Swedish Chef's Kitchens of Doom wouldn't count, since you do indeed injure your opponents, even if said opponents are vegetables?
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I wanted to do a 'shit em down', a shooter with a bird shitting on the people below, but I couldn't finish it. So now I'm cheering from outside :) Good luck, since as I see this was a hard challenge.