This is a cool concept (I love 1v1 couch games). and a game that could cause couples issues :D
I like the low-poly art style and the simplicity of the controls.
What's a bit missing for me is the interaction between the two players (there's no urgency to react to what the other player is doing). One possible way to address is to put a timer on garbage when it gets lobbed over; if it does not get picked up before the timer expires it becomes immovable (or something like that).
Regardless of that, well done on a cool prototype!