It's possible to jump on the bin, door, first delivery truck and lamp pole to reach the roof - where you can see locked areas before they're unlocked and even enter some of them by jumping into the third delivery truck. (through the roof which has no collision)
Other than discovering features which are going to be in the full game, (and aren't in the demo) the issue can only get you stuck in unintended locations. Other things you can do include exiting the (normally) playable area. It's also possible to get stuck in the export trucks.
Proposed solutions:
- Add invisible walls to prevent players from jumping too high and onto unintended objects such as the door and cargo truck.
- Add clipping to existing walls, such as the ones on top of the import trucks.
- Remove the notice on what is nessecary to unlock tier 3 (4?) in the demo (not the full game) and replace it with another "Wishlist on steam" notice (like the previous unlock notice)
- Automatically unstuck the player if they are in unintended positions such as the locked areas and outside the normally playable map.