That was pretty neat! I liked the ingame visuals and the character/gallery art were great. It was fun to play through and did leave me intrigued to see more.
As others have said, the English could benefit from a little polish, never really encountered any issues understanding it but it was just a bit off sometimes. The only other issue that comes to mind for me was the four digit box code. On all the notes, the date is written in American English form (i.e. month, day) but the solution for the puzzle was the British English form (i.e. day, month). This confused me for a while.