No you're okay! Most of the game isn't finished yet, so there's going to be places that aren't as polished as I'd like them to be, or be missing items or npcs that will move story along.
The game is vague with its directions and goals because it started off as a Yume Nikki fan game. The mysterious, unclear motives of Yume Nikki work because it's a game based on exploring dreams. Nocti was originally like this but over time I came up with a plot and I have honestly wondered if the game should be changed slightly to reflect that. This is confirmation for me tbh, so thank you!
There's also no guide because I figured either someone would write one on the YNFG wiki, or no one was interested enough in it. I will definitely start work on a simple guide, and then possibly make a larger, old school strategy guide style pdf that I'll have as a free download.
As for the humans in the ant city and the Molemin being stuck between the wall and back door, i'm going to need more information on those since they sound like bugs. Itch doesn't have DMs so I would greatly appreciate if you contacted me on Discord at Nuxill#7870 or Twitter @Nuxill!
Thank you for your interest in Nocti! I'm glad you've been enjoying it despite being frustrated with it.