Dr Goo
 
 
 How to get passed the first set of rolling barrels:
 It is not too difficult. You can stick to walls and 
 ceilings by holding onto the JUMP key (SHIFT), then to 
 let go of the ceiling or wall, you simply release the 
 JUMP key. The image below shows Dr Goo sticking onto a 
 piece of green vine by his head. 
 
 How to get passed the Security Laser Shield:
 The shield is toggled by a switch which is found directly 
 beneath it. You need to stand on the platform where the 
 switch is and press CTRL. This will turn the Security 
 Laser Shield off.