The toby saga has been amazing so far with the tension buildup! My one complaint with the games though -- The endings are super abrupt and break most of the tension. For example:
-Last game was just a pop up or a jumpscare. Adding a bit of lore, or even one last animation of what happend to the MC before cutting to black would help keep the fear and make it subside slowly rather than it snapping the player out of the experience inmediately.
-The silly factor with the starting text and music at the end of this one break the immersion, and the sudden cut after the last dialogue makes it feel like it was cut off early.
The slowburn horror you've got going on is great and i appreciate you don't rely on constant jumpscares, rather having one at most. But work on the endings being prolongued a bit and keeping anything silly for AFTER the game to not break the atmosphere. But besides that, i hope to see more of this saga!