Shrink not working

[Whoviannerd1206]

I just got this game for my computer and I have windows 10. The game runs and plays fine except for the fact that I can't shrink. I have tried the ctrl button, the left bumper on my controller, I even tried mapping to a different key and nothing worked. I can't get any further in the game without shrinking but I don't know what else to do. Has anyone else had this issue? If so how did you fix it?