Yes, you should be able to change at any given moment. What issue did you face, if you could tell me? It's still a work in progress obviously :)
Viewing post in Keyboard Origami - Trust No Land jam comments
OK, I understand what I did wrong. For instance, it says go from 6 to B. So I tried that multiple times, and eventually it says that I did OK and continues the tutorial. (for the airplane, Q and P). However, I now understand that the game wants me to do 6-T-G-B. That works every time. Took me a while to figure out :)