Use the arrow keys to move. Press space to shoot the space monsters. The higher the level, the more points you need. In level 2 the monsters have two lives. In Level 3 the monsters have 3 lives. In level 4 the monsters have 3 lives and go in a zigzag and so on. You should be able to figure out the rest on your own. There are 7 levels in total. Good luck!
I wanted to make a fun project and also I wanted to beat the current record of scripts in one of my programs. I took like a few days to finish this. My goal is to get at least 5 loves. Play and enjoy! Note: Even I haven't won yet. Leave a note in the comments to tell me what I can improve.