Hello,
I've just tried it myself, and everything seems to work as it should. Where exactly are you stuck?
The tutorial can be completed as follows:
1. Click above the thief with your left mouse button - thus, the hole gun will generate a hole above you, and the grapnel will fall down.
2. Press the E key on your keyboard - you should equip the grapnel, and use your right mouse button to shoot a grapnel to the ceiling above you.
3. Use WASD to move around freely and land on the top level.
4. If you click your middle mouse button, the hole should vanish again, and you should be able to land savely.
5. Open the door by pressing the E key.
6. Walk on the hightlighted area (to the museum sign) in order to start the countdown. After a few seconds, the game itself should start.
It would be great if you could tell me where exactly you got stuck, so I can amend the tutorial after the voting of the game jam has finished.
Thanks!