Just how old are Matt and Alex, anyway?
I'll admit, this is tricky to figure out, given my drawing style throws proportions off madly and makes everyone look like kids. Sorry.
But, as a rough guide, as per the start of the comic, Matt is around 23-24 and Alex is around 22-23. For the curious, Phinn is in her late 60s (but she's an elf, so she's actually fairly young), Jacob's around 21-22, Salthalus's true form is in her 70s, and most other characters can be derived roughly based on this data and how they interact with everyone else.
Note that all this is somewhat variable and subject to change slightly.
What are those odd things that look like noses with feet, eyes, and wings?
Those would be Nasal Flies. They are the result of a completely botched spell. While it IS possible for the mage to accidentally get an effect that he or she wasn't looking for when casting spells, it's also possible to get nothing but one of these creatures appearing with a characteristic "THUNK" noise.
Nasal Flies don't have much in the range of intelligence. They just sorta fly around randomly until their lifespan ends, then they just poof out of existence. Larger Nasal Flies live longer and come from more powerful botched spells.
Basic story, it means someone's either trying to cast a spell they don't know much about or something stopped them from finishing a spell.
How big is the village Matt and Alex live in?
When I first came up with the comic, it was a tiny village of only a few regular people, set on the edge of a small wooded area. Except I realized that Phinn's library wouldn't really fit well in a tiny village, so that idea went out the window quick.
Regardless, it's still a relatively small town. I don't have exact measurements or population data. Nor a map. Sorry about that.