It's an ok game, though the idea is taken from old versions and used over and over again. Basically, there are no new interesting things added to the old idea of driving a monster truck on a rough landscape. Everytime I play such a game I feel bored after two or three runs. It is about time that this game gets some new refreshment for which you honestly can take credit.
First some tips for the game itself:
-The music is too repetitive, try some extra songs.
-The timer is suggesting seconds, but goes extremely slow.
-The game lacks in giving a thrill for a fast, acrobatic ride, as the car is extremely slow.
-Nitro is useless, hardly gives any speed.
Try adding some of the following:
-Players should be able to actually use the coins for eg upgrades (eg bigger tires, more engine power), specials (eg launch control, no damage) etc. What's the use in collecting them for score, that's boring.
-Make tricks worth doing. When I did my 4times backflip, it just showed a disappointing "flip"...give me creds and money!
-Give differences between provided cars, just the color is rather useless.
-Think of something to add some replay value.