If you are still answering questions, is their a way to make the player taller/shorter?
Viewing post in Construct Ray-Casting Template Questions
Without having it in front of me... There's a global variable called "eyelevel" that you can play with which will move the player's pov up and down, but you might also have to adjust the floor and ceiling's effect parameters.
The easiest way would be to make the walls and objects taller or shorter. Take a look at the manual and sample projects.
Thanks!