This game is about space ship to shoot the enemy. It is very easy ,try your best.Hope you can winthis game.
Okay. So here. You need a keyboard, or mouse (like you need to add object in the software); an object with behavior of a bullet.
Now that you have that, you can reference them in event. Here's how:
Add event keyboard> on button pressed> [you choose one] > spawn > [your]bullet > on layer main at image point 1 (it's nose)
Then bullet or spaceship> on collision with spaceship or bullet> space ship > destroy or subtract health (you will need an int value).
If you do health, you need another event that: if > spaceship.Health = 0 > spaceship > destroy> add score and stuff.
The layout itself should have properties, so you can minimize max height, and length.
You can also have spawning not happen while on screen, so you can make a line with stuff.