罗曼国王送报记v3

hello meg thank you for trying to play the paper boy game im working on it to make it more fun and easier to understand. the motive here is to throw newspapers at the houses that have a little clear blue circle at the front of them and the more newspapers you hit the targets with the more points you get. it's a simple game I made based on a game called Paper Boy from the 90s but i will be updating the game to make it a lot of Beter. and so, you know the controllers are opposite.

I rlly wanna play this game, but I’m a little confused about the controls. I know A and D are for moving, but which key do I use to throw the newspapers? I tried clicking and pressing a few keys, but nothing happened. Am I missing something or is it not working for me? Pls help, thx!