Here now, @Jessica8D. As far as particle movements go you might be interested in looking at THIS:

https://www.lexaloffle.com/bbs/?tid=27955

how :O

Hello. Nice work. Can I use it in my own projects ? I can provide credit to you.kind regards.

Thank you so much, and yes you can was trying to learn pico8
I for got what cart i used to help me learn but
also have a look at dw817 they have a good one.
https://www.lexaloffle.com/bbs/?tid=27955
Have fun and i would love to see what you do with it.

Hello. i send you a preview of my project on twitter. Just a gif. (The code of dw17 is not suitable for my project. It does not use the cls() function.)

ok i see go right ahead and use it. I did see you demo it look good i love to see that it helped thanks you for letting me know it puts a smile on my face 😁

That's a fair point, @YannickS. Not today, tomorrow I think. I'll write code that should be satisfactory. It will have 3 steps in it and should not run any slower.

1. CLS()
2. Draw all your sprites and graphics. Yellow here will not ignite.
3. Draw anything YELLOW here to have it ignite, circles, lines, etc.

Any particles from ignition will not interfere with sprites or previous drawings and animation nor can they even be read with pget().

I can have the ignition appear on top of or below that first graphic layer. For the demo I'll work on it will be on top.

. . .

02-16-23
I haven't forgotten you. Turns out I'm gonna post a full game with this method. The source-code will be fully documented, however.

02-22-23

It is complete. You can find it HERE:

https://www.lexaloffle.com/bbs/?tid=51722