In this game you play as Onion Boy, a little man with an onion head. He flies a plane over the city when alien saucers appear and start attacking. Can you defeat the alien ships with your bombs?
You can also just destroy the city if you'd prefer to do that. Hopefully the mayor doesn't mind the collateral damage since you're defending the earth from aliens.
EDIT: For reasons I'm not sure of, firing bombs doesn't seem to work in the browser version on Firefox or Chrome. It does seem to work in the version on the browser in Voxatron itself though. If I can figure out and fix whatever the problem is, I'll be sure to put out a new cart version.


Snowy Window is a Christmas Theme Snow Simulator.
The snowflakes and the fire of the candle is generated
Music by @Gruber , thanks @dw817 !
Controls
- press C to disable snow stacking
- press Y(Z) to enable snow stacking
- Up / Down Arrow keys to change the speed separately
- press Left / Right Arrow keys once to change the wind, hold it to speed up and blow the candle

Some debug tools are included:

See it here:



Here's my second entry for the Pico-8 advent calendar 2019:
DEER SANTA...
- Don't crash into mountains!
- Don't get electrocuted!
- Can you make it all the way to Santa?
Controls
Just hit X to jump. That's all there is to it!
Don't hit the mountains or the storm clouds and you'll be okay!
Credits
Design/Art/Code: Johan Peitz (@johanpeitz)
Music/Sound: Chris Donnelly (@gruber_music)


IN ORDER to make use of this, you must load this cart in Pico-8.
load #esiyc |
Now that you've become familiar with Pico-8's own Sprite Editor and are familiar with the unique way of changing the 16-colors to a different set, you may have already picked out a perfect 16-colors for your cart.
Yet in the sprite editor you have to manually remember what colors you've transposed with others which can be a bit of a headache.
I offer this simple solution. LOCK the colors in after the program exits.
So if you run this cart, (ctr-R), then press (O), then RIGHT after that press [ESC] to exit. You can then bring up your sprite editor and see your own custom palette in use, allowing you to easily color and paint the sprites using the custom color set you have created.



Santa can't breathe on Mars (and he's kind of freaking out about it). In this game, play as Santa as you try to deliver presents to generate enough Christmas Spirit to sustain your lifeforce as you slowly suffocate on Mars. It's easy to go around delivering presents house-to-house at first, but if you ignore a house for too long, its residents' sadness warps the landscape around them. Think carefully about which houses you want to deliver to first.
Controls:
Arrow keys -> move Santa
Z key -> deliver present
Team Lemondrop is:
Janelynn Camingue
Chijike Dikeogu
Natasha Ratzlaff
Rutul Thakkar
Mitchell F. Wolfe
(Version 1.0.2 update)
-Fixed game crashing bug




Greetings Humanoids, so I have been interested in the demo scene for quite some time now and I thought I'd start a group and invite those interested. This is that invite. I work mostly on music but I can do other things to an extent. To those who join, I look forward on working with you. I mostly need a programmer and a artist as, while trying not to sound cocky, I think I have the music down pat. -Simon






It's Christmas Day, and you're the only one working the snowplow today. Can you clear out all the snow?
Controls
ARROW KEYS to move your snowplow.
Z/C/N to select things in menus.
X/V/M to go back.
Hold X/V/M on the title screen to erase your progress (don't worry, you probably won't do it by accident!).
There are 100 levels to complete. Can you clear them all before seasonal depression kicks in?
Made for PICO-8 Advent Calendar 2019.


The russian roulette game with additional rules in multiplayer only.
How-to
- Click on "play".
- The player id is on top. He could make some choice.
- When your turn is over, give the gun to the other player.
The gun is a six shot so count well and use bonus strategically or die.
Changelog
1.3
- Fixed bonus error - Fixed result display |
1.2
- Updated main menu style |
Old Versions




This is a 2-player version the classic memory card game, Concentration. Players take turns flipping cards over two at a time. When a match is found, the player claims the cards and takes another turn. Flipping over two cards that do not match results in the other player taking a turn. Whoever has the most cards by the time all have been claimed wins.
This game is fully playable. I started working on it while teaching my 4 year old how to play with physical cards.
Only arrow keys and the 'X' button are used.
Here's Klax2D!
A 2D version of the videogame Klax from the '90.
A Klax is row of 3, 4 or 5 blocks of the same color in a horizontal, vertical or diagonal way.
There are 4 levels of difficulty: Easy, Normal, Hard, Insane.
The paddle can only hold 5 blocks.
I made 14 levels:
- make 3 klax
- make 5 klax
- make 3 diagonal klax
- make 10000 points
- make 5 in a row
- survive 40 blocks
- make 10 klax
- make 6 diagonal klax
- make 50000 points
- make 20 klax
- survive 80 blocks
- make 100000 points
- make 100 klax
- play infinitly
Score:
- vertical 3 = 50 points
- horizontal 3 = 1000 points
- horizontal 4 = 5000 points
- horizontal 5 = 10000 points
- diagonal 3 = 5000 points
- diagonal 4 = 10000 points
- diagonal 5 = 20000 points
Controls:
- Arrow down: speed up falling blocks
- Arrow up : rethrow block (only 3 times/level + only possible when block hits the paddle)
- C : drop block (save block)
- X : level info / pause
Game over when:
- you have missed 3 blocks
- the whole grid is full of blocks




Z/X - previous/next demo
up - turn on/off aabb tree
down - reset simulation
Several physics demos I've written in pico-8. These follow from the work of Erin Catto (see http://twvideo01.ubm-us.net/o1/vault/gdc09/slides/04-GDC09_Catto_Erin_Solver.pdf)
The solver solves both inequality constraints (e.g. collisions) and equality constraints (e.g. joints).
I've reduced the framerate for web down to 30fps, but it works well at 60fps (in face the higher framerate is better for the solver).
Still issues to solve, e.g. jitter on resting contact, so I probably need to do a rewrite at some point.
update
I've added a couple more demos including mass-spring-damper systems







