If you recall, when we gave the Aliens the ability to fire missiles, one of tests that the code performs is to see if the Alien is...

This is the engine room of Shmupkit. The Spawner itself is a blank sprite, and it's event controls which enemies should be spawned,...

Enemy missiles travel down the screen quite quickly, when they are spawned by an Enemy we pass the enemies direction of travel to the...

Aliens perform a movement pattern which are a combination of directional movements, Direction 0-15, each one representing a point on a...

The player Missile is defined in Spite Type 1. It uses a simple 16x16 sprite image, and is launched when the player presses the fire key....

The player event is quite straightforward. There are controls for left and right movement, thrust upward with the up key, this is...

MPAGD SHMUPKIT is a Multi-Platform Arcade Game Designer project for creating vertical shoot-em ups, initially for ZX Spectrum, but...

Here's a quick way to enable a Double Jump feature in your MPAGD platform games. It also includes a key debounce

Creating a deadly acid drop that grows on the ceiling then falls to the ground

Suppose in your game you want to give the player a set amount of time to complete each screen. And then, perhaps, give them a bonus...

If you're designing a 2D side-on game, like a platformer, chances are your player will need to JUMP. Which is easily added by binding a...

How to make your game control keys redefinable

Using TYPE SWITCHING to change the player type and sprite to create a nice death animation before KILLing the player

Using PLOT to create a meter / bar

Changing the size of the play area window.

Introduces BEEP, CRASH, DELAY, AIRBORNE , timers and temporary variables

So far, we've learnt how to get information onto the screen using commands such as PRINT "" and DISPLAY plus some special ones like...

In our last lesson, we looked at working with the player SCORE, BONUS and DISPLAYing it on the screen, also using AT and PRINT to also...

Our game is starting to take shape, now is probably a good time to sort out the mess that is currently the score bar at the top of the...

40 years on, the thirteen year old me finally achieved his dream...a Crash Smash! There've been several reviews of The Swarm is Coming, her