I have a marketing budget of 100 dollars how can i use it to promote in an efficient way please someone help
Depends on what you would define as "efficient" Is your game good? Have you published it? What is your retention? If you really want to invest in a game that you haven't tested, my advice is DON'T. Just wait until you know enough, game making wise as much as marketing wise. And the latter is harder. Because without learning and having your game tested, there is a 99% chance you won't make your money back, and that is an optimistic assumption. If you want to make any money contact publishers. And even if you want to publish on your own, first send your game to publishers. If nobody responds, that means your game is not ready to spend money upon. Trust me. Save your money pal. You'll thank me later.