@zep This maybe isn't a bug, but it feels very weird to me:

cls()
if (1)<2 print"a"
print"b"

this prints a b, but I would expect a syntax error instead -- the condition is "1<2" but the if-shorthand parens are only surrounding the 1, instead of the whole condition.

(if you change it to if (1)<0 then it only prints "b", which verifies that the condition isn't being interpreted as just if (1) or something like that)

oh, and my system is pico8 0.2.6b / linux

Just need some solutions.

Ball Bouncer

by OgelGames

Cart #ball_bouncer-0 | 2024-05-08 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

5

A simple arcade game made with only 500 characters for TweetTweetJam 9.

Use the left and right arrows to move the paddle. Press X to restart.

Score points by bouncing balls on the paddle, with consecutive bounces scoring more points. The game ends after 60 seconds.

Also available on itch.io.

down_the_tunnel

by amwmedia

Cart #down_the_tunnel-0 | 2024-05-08 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

9

A fun little song and visualization. Enjoy!

I've tried specifying the channel but didnt change anything.
My sound is definetly working, the volume on the sfx's notes are higher than 0 and I can hear the statup bleeps from Pico-8.
BUT THE MUSIC DOESNT PLAY

Evolving Ants

by OgelGames

Cart #evolvingants-0 | 2024-05-07 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

2

This is a very basic implementation of a genetic algorithm, partly inspired by this Code Bullet video, with a few additions to improve the evolution speed and reliability. It's nothing fancy, but I found it fun to experiment with, so I thought I'd share it.

Each "ant" has a DNA consisting of a list of directions to move each frame, which starts off completely random, but though the process of mutations and "natural selection" evolves into a path to reach the goal.

To improve the evolution speed and reliability, the ants are evolved gradually by giving each generation slightly longer to reach the goal. In addition, the mutations to the DNA are biased towards the end of the path, so more ants have a chance to explore the end of the path before they die.

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Hey pico 8 community. I recently started making some demos and carts for myself and my friends. Although I have been struggling with collisions. Most tutorials use fget and mget. I want to use them, although I don't understand the parameters that are used.
I am not looking for a one size fits all code. I am just looking for a explanation for how they work, and what the parameters are used for and how they work in functions.

Thank you :D
-BEiNg139

Hi @zep!

pico8 0.2.6b / linux:

cls()
if (false)?1 --hi
print(2)
print(3)

expected output: 2 3
actual output: 3

Here's an altered version that works as expected:

cls()
if (false)?1
print(2)
print(3)

(this prints 2 3, as expected)

3 things seem required to trigger this bug:

1. shorthand if
2. shorthand print on the same line
3. !! further text after the shorthand print (" --hi", in this example. but just a single trailing space triggers the bug too)

When these are all true, the next line seems to get scooped up into the shorthand line. This can include attaching an else to the wrong if, like in this more complicated example:

cls()
if false then
 if (false)?1 --hi
else
 print(2)
 print(3)
end
print(4)

expected output: 2 3 4
actual output: 4

Title says it all.
I'm making a horizontal scrolling game with a map 32 screen wide and 1 screen tall, and with the player using extra colors different from the enemy colors. (enemies can't be over or under the player).
For this, I'm using screen rotation, but now I can't use print to display text any more as it appears rotated.
Has anyone already implemented a 90° rotated print function ?

Hi, I encountered a waveform corruption bug while trying to move SFX as part of a multi-composer collaboration project.

On version 0.2.6B

Reproduction steps:

1) Make a custom waveform in SFX 0
2) Make in SFX 1 make a sequence using SFX 0
3) Make in SFX 2 make a sequence using SFX 0
4) Move (cut and paste) SFX 0 to SFX 4
5) Move (cut and paste) SFX 1 to SFX 5
6) Move (cut and paste) SFX 2 to SFX 6
7) Check SFX 4, the data will be corrupted

It seems that this can happen with other combinations but this is the procedure that caused the bug to happen and is reproducible on a fresh cart.

The corruption seem to be an inversion of the sign of alternating sample of some sections of the wave

Xhive

by gmsndfxn

Cart #xhive-4 | 2024-06-27 | Code ▽ | Embed ▽ | No License

20

Mission

The origin of the hostile aliens has been found. Your job is to fly into the xeno hive with one of the best combat spaceship and kill everything.

Instructions

• If you shoot, you move slower.
• Colliding with the hive, aliens or their projectiles will damage your ship.
• After you leave the hive, an NG+ starts.
• Every run, the hive is procedurally generated.

Controls

• Move: Arrow Keys

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Star Striker

by Andrew967

Cart #starstriker-2 | 2024-05-06 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

6

Star Striker

by Andrew967

Cart #starstriker-0 | 2024-05-06 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

6

Controls:

X to shoot

Z to use your strawberry bombs

Arrow keys to move

The only power-ups are the strawberries, nothing else is a power-up.

Story:
You are a space fighter who is currently fighting in the war of Andromeda. You were told to go to fight a battle against the evil aliens and you were told that people would be joining you to fight. But nobody showed up. You are all alone fighting 20 waves of evil aliens. Can you do it? Can you defeat the Gorthen and end it all?

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We definitely need an option to download carts in splore. I bought this for my steam deck expecting the standalone app to be, well, standalone. I have to reboot my whole system to access the web browser and file explorer needed to download and add carts. It's very frustrating that such an essential feature was ignored. I doubt there's any chance for a refund, so I guess I'll just have to beg for features that should have been included from the start. Maybe if I'm lucky it'll be added in less than a year. It's only been 9 so far..

Maybe this is overly salty, but it's very frustrating that an implied feature isn't actually present when it's the whole reason I paid for the standalone app in the first place. Buyer beware I guess...

mamono_pico_fix 0.1

by RealShadowCaster

Cart #mamono_pico_fix-0 | 2024-05-06 | Code ▽ | Embed ▽ | No License

5

A bug fix version of mamono pico by @65c02
https://www.lexaloffle.com/bbs/?pid=128341

Fixed :

• crashing at end of levels
• impossible to win levels
• not dying when killed by a monster that would have made you level up

Remaining known bugs :

• you can mark a monster even after killing it, and this can disable showing the red number of the monster
• some rare crashes from menu after game over, unknown cause.

Done :

• damage is now the same as the original game

Todo :

• blank pause menu
• Remaining ennemy count in status bar
• timer
• high scores
• Max difficulty
• custom levels
• wraparoud
• mage (fireball chording)

[ Continue Reading.. ]

zap_bot

by Achie72

Cart #zap_bot-3 | 2024-05-10 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

14

About:

Zap-bot is an homage to the old Gameboy era cheap SBC (single board computer) handleds and their stupid little games, like the Classic and Brick Brick game!

This is a port of the shooter line filler game inside that. Your goal is to clear the lines for as long as you can last!

Controls:

Move with arrow keys left and right.

Shoot with X.

Brought to you by:

My awesome supporters over at Ko-fi! They allow me to pursue this niche hobby of mine! If you'd like more, consider hopping over to my Ko-fi page, where I share pixel art, game devlogs, postmortems, code rundowns, all that gamedev jazz! And if you can maybe drop in a coffee so I can make the next one faster!

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