This game is great! Neat upgrades and numbers game, I like the story, and although it took me over an hour, it was satisfying making the phone. There's one key detail that made this play through long for me:
When getting to the thousands for your resources, sliding the bar to decide how much of the resource you want to use becomes hard to place exact amounts of what you want. What this led to was me putting roughly 800 metal into the caldron- but this blocked my ability to make rock fairies and the fairy capacity upgrade, as the system defaulted to using the rock I put in for sand instead. This led to a really long process to making rocks, needed for sand, needed for glass, needed for the phone. The playthough took me 75 min (granted, I didn't get every new upgrade as soon as I could, so I could also just be an L gamer).
Aside from the mixed pixel ratios and the metal resource slipup, This was a fun experience! I liked the flavor text from the witch girl complaining about the books and the potions high up on the wall. It was also cool seeing the fairies going out the door, then to the fields. Them not talking to you and just doing what they have been summoned to do is a great touch. I love the continuity in this game storywise!