I've started playing bustabit since past week and lost around $45. Is there any script that works? or it is just a game of luck?
It is a provably fair game which means that the results are not rigged.
However, it is still a -EV game. If you gamble 100x your balance over the long run you are expected to lose all your money, due to their 1% house edge(around that figure, i'm not sure what the exact figure is).
You are playing with your luck which means you won't be able to win in the long run.
You should take gambling as a way to entertain yourself, instead of a way to earn money.