Their are many mobile game but I dont think that as this gaming application is advertising I dont think it is worth it.
1: - You should have invest your very much time and attention just for earning 20-30 rs.
2: -Even if you are playing for fun then its ohk.
3: -If you are not that good at playing then I dont think you can earn the money other than 10-20 rs.
4: - Their are many contest that u like to invest money in but end up by losing intrest in that.
5: - After entering the contest you should habe to pay entering amount.
6: - After entering that you have to be active at the full time till the contest end.
Overall very less chance to earn and more chance to lose your invested money.
Not that much value of time.