Playing fc games as a child. The content of the game is about controlling a child (protagonist) from left to right, and moving forward will be faster and faster.

Hello, the game you are talking about is FC's Jump Heaven, a black and white boy running in the direction of express delivery. There are some red enemies in the grass, which should not be birds. They can be used to throw at other enemies and fly back later. The first BOSS is very similar to your red weapon.