Gotta say not really worth it. Feels like a lot of missed potential here. The game just felt a little short and empty. The big machine literally did nothing after it was built.
The devil dev insert was nothing. The secret power to fulfill "my desire" was just a skin swap to another npc which it didn't even work when I got the 10k to do it.
There was dialog that for whatever reason didn't load so I sat there looking at 2 characters lip syncing. Some dialog hinting at your character being fed by a couple romance npc's never happened which was a let down. And the weight gain itself was pretty mid. Most of the weight goes right to your ass and your tits giving your character the goofiest hyper look.
There was plenty more to say, but I forgot most of what I wanted to say so ended up with this mess. I hope your next game is filled with content that isn't grindy repetitive jobs. The only different thing I got to do that was "fun" was feed the others which btw, the fact that the cook throughout the whole game is warning you not to eat and doesn't want to eat much herself all of a sudden at the end basically says feed me and lets you stuff her for no reason. I'd give this maybe a 6/10 and only because of the quality and the bit of actual weight gain that looks good.