OK here is a small spoiler due to some help requests.
*SPOILER ALERT*
1. You guide the chomper to press the
GREEN button trough the WHITE path.
2. You guide the chomper to press the
PURPLE button trought the
BLUE path.
3. You will need to wait about 1 second in the places marked in
YELLOW SQUARES.
4. You should never stop in places marked in
RED.
5. You will find useful to keep the chomper in the position shown in the picture to catch the coins.
6. Bonus Coins marked in
LIGHT BLUE are easier to collect than they look like.
7. Places circled in BLUE are the safest places for the chomper.
*SPOILER ENDS HERE*
Hope this helps!