This is really cool for something that was made in 48 hours. It feels like something I'd find on a 100-in-1 NES cartridge along with Track and Field but a lot more polished. Everything about this gives me that nostalgia. From the warped edges giving it that CRT feel, to the squishy sounds your players make when they move.
I would however just mention in your practice section that the throw mechanic requires you to hold the button for the throw and to increase the distance. That took me a while to figure out but your instructions are a lot more than they would have given on a NES game.
Overall had fun trying to get my first win (Which I did, after about 6 games) and would love to see a 2 player local play version of this.