Needs to be jailbroken
1. Open up cydia

2. install ifile

3. it cost money but you may use the trail to edit games

4. open up ifile

5.Scroll down to var

6. Click Mobile

7. Click applications

8. go down to the settings button or the gears buttons and click applications names[ON]

9. click done

10.Scroll down to tiny wings

11. click library

12.Click preferences

13.Click the one that is not highlighted in blue.

14.click edit

15.Highscores-scroll down past the achievments on the first highscore will look like this
<key>highscoreentry0</key>
<integer>This is the part you edit example 999999</integer>

-click save and go to tiny wings


x30 multiplier- under every achievment will say
<true/> or <false/>
- ok so change all the achievments to true

EXCEPT achievment number 30 and 31
you can try but if your game messes up i am not responsible.
-Save and have fun!
If you need any other game i can try to make a tutorial for you and post it. Hope this was helpful (: