Nice model for the girl, and I like how the dialogue progresses, revealing more of her character, especially at the end with the possible hints of what could come next. I can imagine this game having a fleshed out backstory if it's expanded on, like having the girl spread rumors of her experiences with the tentacle monster, setting up encounters with different characters.
The controls for the tentacles were a bit confusing at first. I was expecting a sort of toggle on and off after you select a tentacle, but because misclicking also deselects the tentacle, it took some time to get used to.