How can I make a game without coding?

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.

It depends on the route. With an AI builder you play a first version within minutes, then need days of polishing before it is really fun. With a game engine as a beginner, expect weeks to months, most of it learning the tool. Either way, most of the time goes not into building the game but into tuning it, testing with players and fixing what annoys them.

A platformer needs four things: a character that runs and jumps, floors and platforms to stand on, a danger that makes you lose such as spikes and enemies, and a clear goal at the end of the level. Tune the jump until it feels good before anything else, then build a short level that teaches one new move at a time, and only then add coins, enemies and checkpoints.

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.