How long does it take to make a simple game?

You can make a game without coding in three ways: a game engine with visual tools where you drag objects and wire up rules, a ready template whose art and levels you change, or an AI builder where you describe the game in plain words and play it in the browser within minutes. Whichever you pick, start tiny: one character, one goal, one level.

A game is fun when the controls feel good, the feedback is clear and the difficulty rises gradually. This is called game feel, and it comes from small numbers you tune: jump height, movement speed, how quickly a button responds, and the sound and shake on every action. If your game is boring, the fix is usually not more features but tuning those numbers and testing them again and again.

Make your first game 2D. Two-dimensional games are simpler to draw, animate and collide, they get finished sooner, and they run smoothly on most phones. Choose 3D only when the idea itself needs depth and a place to move around in, such as a showroom tour, an obstacle course or a race, and accept that performance depends on the player's device.

Possibly, but nobody can promise you an income. Small games mostly earn indirectly: a business pays you to make a game for its campaign, you sell game-making as a service to schools and shops, you put the game on your own site to attract visitors, or you run it as a prize contest. Selling the game or relying on ads needs a large audience.