The art style here is just... so good, I love it. Every time the door opened I kept hoping they were going to be a character I hadn't seen, because I love them all. My favorite is cloud person (name proposal: Skye).
The game itself could use some polish, though. In particular the flow of having a new customer come in is a bit tedious, it's a lot of clicking on small buttons that are far away from one another. You have to: advance the conversation to see what they want, switch to the summoning view, then once you've dragged in the ingredients (which controls pretty well) you then click the summon button, then click the present button on the other side of the screen, then advance the conversation one last time... It's kind of a lot when one recipe, once in the summoning view, takes just a few seconds to enter if you know it already. All that is to say, as a relatively small gripe, the game could flow better.
Also I wasn't able to finish the game because I ran into a bug where no more customers would come in on day 4 :( I really wanted to finish it, a real shame.
Aside from this, the idea of the game itself is pretty good. There's an element of shop-keeping and management, although that's relatively simple, but also this element of discovery of creatures to summon. You're given these wonderfully vague hints about how to make the variants of each summon and that's just excellent, bravo. I'd love to see this game get a coat of polish, plus a new mechanic or two (maybe a money system where you actually repair your house piece by piece?). Great job!