Hey there! Sorry you're experiencing issues but the good news is we can probably help with that.
While in the Craft, using A and D will navigate between different fast travel points in the Park. (It only cycles through those that are unlocked.) Pressing Space will initiate teleportation.
Your only option until you've unlocked multiple fast travel points is to press Space and teleport to the first one that's unlocked. You'll know everything is going according to plan when the Grey Man removes his hands from the cubes and prepares for teleportation. If Space didn't work initially on a screen with a single fast travel point unlocked, try entering the screen and hitting Space without pressing A or D beforehand.
Let us know if you're not seeing any unlocked fast travel points when you enter this screen or if hitting Space is still not working for you after trying the above.
You can also check out the included User Manual for a detailed breakdown of all the game's controls.
Happy explorations, traveler. May your future teleportation efforts be successful.