It's pretty okay for a 72 hour jam, I got confused at the controls at first but got the hang of it later on. One nitpick I have for the game was the apples, I probably missed on what it was supposed to do but I think it was supposed to give back health?
But anyways, as for the game mechanics, the scythe was a little slow to catch some zombies, and the game would've benefit from more faster gameplay. I guess some variety would also be needed because after 4 minutes into the game, it started to feel a little repetitive.
But overall, still a job well done for doing all of the assets, and mechanics by yourself and this would be worth a learning experience. Keep jamming!