Writing: The story and the characters are fun, although the spelling and grammar gets a bit odd at times: most obvious the name “Alien 2” is spelled “Aline 2” every time it appears. And I think I spotted several other typos and a few grammar mistakes (example: you wrote “Havn’t you eat” instead of “Haven’t you eaten”). Maybe you could run it through a spellchecker, that should at least pick some of the typos.
Theme: It is about people celebrating Halloween and it’s from the point of view of a sentient pumpkin, and it involves some supernatural stuff, including witchcraft and aliens (maybe a bit fairytale-like, but I prefer that over writing a seemingly random story and then adding a loud “boo” at the end).
Audio: I noticed music, but no sound effects or VA. The music is fun and fits the stories. There’s different music for the different routes, and I like it.
Art: The sprites look cute and cartoonish, the backgrounds look sorta like photographs edited to look like paintings. I kinda think I liked the sprites more than the backgrounds, but I did like both.
The UI wasn’t customized, and that’s okay, but maybe you could have made the cloud’s name appear in a colour that was more readable on the background or maybe given the letters a border.
Fun: The stories were fun, and trying different options was fun too.
What I liked most: The story, the characters and the sprites.
What I’d suggest changing: maybe add some sound effects, for example maybe some chimes could work well when the pumpkin turns into a carriage (or into a lamp or a pie), or some sound could play when the UFO falls down. And make sure the word “Cloud” is readable and fix any typos you can easily spot.