Hi Juan,
For the first suggestion, insect enemy would be nice to add into the game (probably mutated version). I added nature themed areas at v0.0.6 so it would be fit to put them there.
Secondly, i have a similar idea. Instead of using single sanity value to judge the character mental status, multiple value would be used to make an overall analysis (such as Loneliness, Desperation and Nervousness, which i have think so far). But i am still thinking on how to present their effect.
It is sad that the subway area might be quite unsuitable to add into current map since the town is not big enough to establish subway system economically. Maybe some similar area like sewer system would be more suitable.
For extra suggestion:
1: The shopping mall is one of the planned location in the map, but i am not very clear with the enemy concept.
2: I would see if any region can bring in these concept.
3: I can add it as one the loot in the sport shop.
4: Yeah, could add some boss to the game to bring more challenge.
5: Maybe at future version, want to focus on the content and system development for now.
Thanks for your suggestions :)
The next update would be in 3 - 4 days!