Haha! Such a fun, little tycoon game! The concept is really creative! I will only say one thing, it took me a while to notice, that I was attacking the slimes by clicking them. Since the only animation was the health bar, I was busy looking at the player for an animation of him swinging. But after I found that out, I had tons of fun with upgrading myself, and the island swarming all over me.
Great game, fantastic work!