How can I spown a pawn

You can use a SpawnActorFromClass node in your blue print. Set the location to wherever your spawnBP is. Then use a either BeginOverlap or on Hit to programs the points/score you want to increment or decrease.

I wanna spawn a pawn object from the top of the map if hit the character score+10 if hit the ground lose 1 live
i wanna make an easy game you can move left or right an need to catch falling food

now i need to implement the live and score:)