This is the game I am developing where the main game mechanic is like "snakes with guns".

So I have learned how to write to the Playfield register, and how to count scanlines.

So now I know how to do that as well as load player graphics from tables. I also learned how to load graphics using a pointer. By using LDA (ZP),Y I can point to whatever table of graphics I want to.

I have also learned how to position graphics on the Y and X axis.

One thing I still need how to learn how to do is change the colour of graphics line by line. I think I can also change the colour of graphics using a pointer.

I think I may need to implement more than a one line kernel. Doing all these things (positioning player0, player1, the ball, the missile... Colouring everything...) will take a lot of cycles.

But things are looking good. This kernel will be for the overworld, so it's a little more simple than the actual game mechanic.

After I manage to master the overworld kernel, I need to invent a kernel for the "snake" part of the game. That part will involve trying to work out how to draw 2 or 3 "dots" behind a soldier icon.

Because the main mechanic of the game is a game of snake where you shoot the last soldier in the line of soldiers.

The snake will be easy to draw in a vertical line:

o
o
o

But not in these forms:

oo
o

or

oo
..o

or

ooo.

So I'll need to learn how to make a simple multi-sprite kernel perhaps... Or I could use playfield graphics... Like in Surround. I could make a table of shapes to draw using playfield graphics... Surround draws playfield graphics but leaves them on the screen - it just doesn't erase the end of the line.

I could ask for help on that one, or I could just have a think... I think the table of shapes to load in as the soldiers move around the screen would be a good idea.