It's not that bad! But it is also not worth 9,99€/$, if you ask me.. Wait for a sale and you have fun for some hours!
Its a classic top-down-racing game. It's not that "Bang Bang" like my first thought when i read the game name. The only thing that can explode is one type of 3 different barrels. It's not something like Mario Kart, but you can see it in some Let's play or example videos. But still it is a nice game, sometimes too easy, sometimes really challenging, but there are some times while playing you are proud of doing something. ;)
The Data about the game:
There are 9 tracks with 6 different types (normal, reverse, short, short reverse, with cutoff (? sorry, i am not a native English speaker ;) ) and cutoff reverse) and 20 different cars sorted in 4 classes. The types are handling, protected (stronger in crashing and have more health points), best acceleration, best top speed, strongest nitro.
The Singleplayer is okay, but not addicting. Just if you want all achievements.
But the Multiplayer is really, really fun! You can invite some friends and play with 2 player at one keyboard and with xbox-controller with bots. It can be really fun and is worth some Euros, but dont expect to much. There are better Top-Down-Racing-Games, but this is still a nice one.