When you are in a fight and you don't want to get hurt, just press the [CTRL] button and type "shell".
When you are in a level and you don't want to get attacked, just press the [CTRL] button and type "free". The level will be free of dinosaurs.
Scan computer screen:
Hold the scanner in scan mode up to solid colors and get DNA.
Scan same code twice:
After you scan a barcode, scan the same code but in the opposite direction. The DNA generated can either be the same or different.