Nice music there bro!
When I create music for games or inspired by some sort of video game, I usually listen to a whole bunch of music from a certain theme or specific games that I am trying to base my music on. So for instance, with my album "Video Game" (I think it's called), I referenced a whole bunch of Ratchet and Clank music and Jak & Daxter soundtracks, even going so far as to literally research how the Artists drew their ideas up, like where they got their sounds from, etc. So I did the same of course. Literally went out of my way to use the exact samples they used for my music.
So yeah, a lot of referencing. I really like the pluck instruments in that cosy soundtrack you showed man. Good stuff! ^_^