Overall, a fantastic entry.
Great art and music. Everything has a mischievous, Halloweeny vibe. The theme is deliciously gross. Eyeballs and hands in a pot--brilliant. The customers are very well-designed, and the frog is adorable. I laughed out loud when the angels first showed up.
Some of the UI is a little counterintuitive. The GIFs on the game page make for a helpful tutorial, but I still found myself confused about how to serve up potions (although in practice, it worked).
The pacing is a little off. Although it's a lot of fun to spray those pesky angels, the night lasts too long and I found myself just waiting for dawn.
Also, I think it might have been helpful to give the player a bit more money in the beginning, or at least set the lab up with a single pot and a couple of free seeds. It is a little too easy to waste all your money buying pots and then realize you don't have enough to buy any seeds.