In the second level of the first pack, there are single-block platforms. The last platform has the portal to enter.
Strategy[]
Jump up and then move right until you are above the next platform. Continue until you reach the portal.
Obstacles[]
Obviously, if you do not land on the platforms, you will fall off and die.
Signs[]
"If you fall off, you die! Don't worry, you'll respawn."
"If you find a level too difficult, press the 'delete' key to go back to the menu."