Level 01 to 10 Warp:
When you get to the flashing section of wall at the end of the first level, turn
180 degrees and fire at the wall. The wall will disappear, revealing a clue item
that will warn you that you are nearing the warp. Move forward and shoot the next
wall to reveal another flashing wall. Walk into it to warp to level 10!
Level 10 to 20 Warp:
As soon as you see the Level 10 exit, turn 180 degrees and fire at the wall.
A new exit will open up that takes you straight to Level 20!
