Straight Line Cheat
There is a cheat where you can glitch the game into allowing you to run in a straight line. This is quite tricky to do but to perform it (which although doesn't allow you to save your score, you can take a screenshot on some phones to show off to your friends!) follow these instructions:
1. Enter the options menu and turn on the Tutorial. This gives you a simple set of turns and allows the glitch to be performed.
2. Start a run. As you approach the firt corner, double swipe on the screen as quickly as you can. You need to make sure the game registers both swipes, but do it very fast.
3. Your character will spin around and begin running in a straight line. It is still possible to die by swiping into the wall and letting the monkeys catch you, but you should be able to just leave the game alone and your character will keep on running!
You really need to have purchased some power-ups in advance to allow you to get big points on this, as otherwise you won't really come across any.