Hello all - Admittedly I've been running around the game searching for hours for secrets and I cannot seems to find anything. I work a full time job and would love some hints, as despite my efforts im missing out on so much. I have about 15 hours in the game and I swear i cannot find anything. At least help me find the tennis mini game.

tennis minigame is in the college on the first floor to the far left.  Go there are beginning of game and get phone then get rid of ghost and go back and wait or follow the girl running around looking for her phone.