I'm not sure why exactly, but the game's visuals, I would guess, are the primary source of the game's lag. It looks alright, but at what cost, ya' know? This looks like a Unity project; if so, it shouldn't be so much different to export this as a downloadable executable, which I'd recommend doing so that we can properly playtest your project! :)
Viewing post in pumpkin.Guts (2021 Revision) jam comments
Btw, the visuals are certainly the lag. Despite not re-drawing anything, there are a ton of new graphical enhancements. The fog, the death smoke from the enemies, the pumpkin guts splatter and the small smoke effect from the pumpkin guts blaster add quite a bit of graphics card consumption. Also, the map is a live camera of all the houses, so it's rendering practically the same thing twice! Nevermind all the post-processing...yeah, I was in a bit of a rush to get it done cause I started on the second to last day (Well, I started at night), so I might have overlooked a few (by few, I mean a LOT) of areas to optimize.