So... This thing is very much 'not finished'. It's highly repetitive (go right, click to kill slimes.) and the control architecture is mediocre at best. The instructions are near uninstructive and there is neither a pause menu nor a way to mute the music. (not that I actually listened to it, I play without sound.)
That being said...
I freaking love the graphics. For a game so deep in alpha-land, it's got wonderful graphics. I like the concept, but it needs some sort of story. You just don't get to name something 'Fallen Kingdom' without an awesome backstory in place. The berry farming mechanic is cool, but it's not enough. Make more stuff interactable. Maybe I can sleep in the tent, or I can go visit the village and sell...slime guts or something so I can buy better weapons, etc. I look forward to this game in its completion.
Anyways, happy hacking!