[contains spoilers!]
I absolutely LOVE this game. It's very high quality and I can imagine seeing this game on steam. I believe people would definitely buy the game if you added a price. I'm addicted to playing pumpkin panic. I'm begging you to add more, like another level or chapter.
Speaking of expansion, if you do end up making another level you could expand upon the player's outfits, making more colors and or fabrics as I unlocked all of the clothing options fairly quickly. You could also potentially give the pumpkin mask options like a regular mask, for example a bunny mask or potentially a jack-o-lantern and they could turn on the lantern & their face glow as well.
You could potentially add a clock/calender in order to track how many days you've survived and if it's turning night time soon.
Things you might want to know
For some reason the clown was very hard to beat for me, I'm not sure if other people struggled with this but I thought the note was a trick or a way to lure the player in. I had to look up how to not die by the blue clown, and I'm not sure if I would've figured it out, had I not. In hindsight it seems obvious, though.
Secondly, the deer's rage can be triggered through walls! Sometimes the deer corners the player whilst the player is in their house, usually happens when the wendigo is spawned, making it even harder for the player to leave the house and more possibility for their shadow self to kill them. However, if you and the deer get close enough, the deer will transform and run away because it can't walk through the door, and ultimately freeing the player. I am unsure if that feature is intentional or not, so I figured I'd try to let you know!