wwwwwwwwwwwwwo
,

this is your first game.... how do i make one?

The sprite should be animated. You need a colored backgrounds with different objects, not just a blank white one. The jumping control is ridiculous. You jump all the way off the screen. There should be more levels and monsters to fight. What type of animal or person are you in this game?

It's good for your first try. Maybe adding more features would be nice.

good job in making a game, that's the first step, i recommend you play testing your games a lot before releasing them, friends and family make good testers as you can see how they react to it. good luck.