About jarnik (twitter: @jarnik)


Ludum Dare 34
Ludum Dare 31
Ludum Dare 28
Ludum Dare 26
Ludum Dare 24
MiniLD #34
Ludum Dare 23
MiniLD 31
Ludum Dare 22
October Challenge 2011
Ludum Dare 20
Ludum Dare 17
Ludum Dare 15

jarnik's Trophies

The Morpheus Sleepy God Award for awesome game involving a sleepy god
Awarded by allen
on April 26, 2010

jarnik's Archive

Sunny Side Up – FINAL

Posted by (twitter: @jarnik)
Sunday, December 13th, 2015 9:42 am

Here’s what I created tomorrow in under 4 hours:

Sunny Side Up

I’ve always been using Haxe, this time I’ve decided to try Unity, though I tend to avoid closed source. It’s been fast and effective.

Verbal – conversation tool

Posted by (twitter: @jarnik)
Sunday, August 9th, 2015 1:36 pm

Hey, fellow jammers!

Please allow me to introduce Verbal – a little tool for in-game conversations.
I could not find a conversation tool that would be simple, flexible and open, so I made one myself.



Admin vs BFU – FINAL

Posted by (twitter: @jarnik)
Sunday, December 7th, 2014 1:40 pm

Type bash commands, slap users, sacrifice goats to make the system work – that is the core of our jam entry :)

Admin vs BFU


“Frankie is a common IT guy, he just cares about his lovely PCs and servers. He feels that work as admin must be like live in heaven except one moment… There are days when creatures from hell, usually called BFU, are trying to use his loved PCs and spread virus among them or damage them like dirty mouse wheel. But there is one thing which makes his day, slapping the BFUs. So, welcome to IT department simulator!

Frankie, the network admin guy, controls, repairs or scan nearby PCs and servers by using shell commands or performing special admin actions, for example sacrificing goat. Admin runs between his office and computers to fix all the problems caused by the users. The computers are connected via network to server which can be seen in the computer network map. If computer is infected then virus can also spread to the connected server through which other computers can be infect later in the network.”

Made in a team of 4 in a day and a half. I was the only one who’s done a game jam before, and it proved some tips I’ve gathered were quite useful (especially planning wise). I’m glad my friends came to appreciate the awesomeness of simultaneous programming with git :)

Hope you all had fun, because we certainly did! :)

Bonus points: play the game to guess the two websites that BFUs are watching when not working on their spreadsheets 😀 (not shown on the screenshot above)

COIN – Final

Posted by (twitter: @jarnik)
Saturday, December 14th, 2013 2:28 pm

“COIN – You got only one” is a micro-investment simulator.

What will you do with your only coin? Buy a hotdog, hear a busker song or throw it into a sewer?

Choose well, you have only one chance.

What would others choose? Check out stats at the end of the game.



There’s not much of a gameplay, but I enjoyed drawing the characters and after a series of code-heavy Ludum Dares, this one was a treat. I made it in 10 hours (my awesome wife helped me a bit with sound effects and played the busker guitar song).

Coin progress

Posted by (twitter: @jarnik)
Saturday, December 14th, 2013 7:15 am

I’m making a single-choice game called Coin. You could call it a simple microinvestment simulator :)

Progress screenshot:



I’m in!

Posted by (twitter: @jarnik)
Friday, December 13th, 2013 1:07 pm

And it’s gonna be my 11th Ludum Dare (including a couple MiniLDs).

I’ll use OpenFL, GIMP, Audacity and SFXR.

With Christmas coming in soon, I should be helping my wife with baking Christmas cookies and cleaning up, so I hope to make a simple nice game and wrap it up during Saturday.

Looking forward, let’s enjoy it, everyone!

miNOMalism FINAL – those pheromones won’t disperse themselves

Posted by (twitter: @jarnik)
Tuesday, April 30th, 2013 2:22 am

miNOMalism is a minimalistic food chain ecosystem simulator, with you being its lowest part. However, thanks to pheromone distribution, you can control bigger creatures and keep the races from going extinct and thus the whole ecosystem in a balance.

You can play online or download a Windows version:


Only a few people (outside the LD community) has played so far, saying it was fun and “damn, HARD!”

I’m pretty satisfied that we’ve managed to balance the ecosystem to be manageably stable and still quirky. Planning all the rules before hand in a strict manner with no loose ends probably helped.

This was my 10th anniversary Ludum Dare and 3rd Jam, but it was fun and exhausting as always! :)

Thanks to my teammate Eatacay, we’ve got a great music and some minimalistic graphics :]




miNOMalism day #1 progress

Posted by (twitter: @jarnik)
Saturday, April 27th, 2013 3:11 pm

After the first day, we’ve got quite fun game coming up:


It’s a minimalistic food chain ecosystem simulator, with you being its lowest part. However, thanks to pheromone distribution, you can control bigger creatures and keep the races from going extinct and thus the whole ecosystem in a balance.

There are no sounds yet, no title screen. The rules are explained at the link above.

We are Eatacay (concept, graphics) and Jarnik (gameplay, programming).

Minimalistic Food Summary

Posted by (twitter: @jarnik)
Saturday, April 27th, 2013 3:04 pm

I’ve been busy the whole day coding the game, so I’m posting today’s food photos before going to sleep.

Lunch (was actually a breakfast :): Turkey stew in cream sauce with dumplings (made by my übercool soon-to-be father-in-law)


Dinner: Pancakes with jam and whipped cream


My 10th LD anniversary!

Posted by (twitter: @jarnik)
Friday, April 26th, 2013 9:05 am

My first Ludum Dare was LD15 and including some miniLDs I’ve participated in 9 LDs so far. So LD26 is a going to be my 10th Ludum Dare.

It’s also going to be my third team Jam – this time with an awesomely talented composer and graphics artist, who contacted me thanks to 1GAM.

Tools: haXe NME, GIMP

PostLD25 Goatzilla vs Nuclear war

Posted by (twitter: @jarnik)
Friday, December 21st, 2012 3:58 am

I wanted to devote just 8 hours to LD25, but eventually I ended up with just 2-3 hours, thus not finishing my concept and not submitting the game.

However, I really liked the theme, so I finished the game later.

Goatzilla vs Nuclear war:



The story: nuclear war is raging, goatzilla appears. Various nations are firing missiles at each other, while still building and improving their settlements.

As a goatzilla, you have three options:

  • let the humanity perish (stomp all the houses)
  • force the humanity to unite, then let them destroy you (stomp near houses to make them shift sides and unite)
  • get killed early, keeping the nations separated

I’m in!

Posted by (twitter: @jarnik)
Friday, December 14th, 2012 10:48 am

…for 6-8 hours.

Lately I’ve accustomed myself to devote just a few hours to LD instead of the whole weekend. You get all the thrill and excitement of the early game design and development, minus the afterward nitpicky coding and asset polishing – in case you’re able to come up with a brilliant and easily implementable idea. The reality was, I had often spent more time, around 12 hours, with the game, but at least I have a time limit to strive for.

I’ll definitely use HaXe. I am thinking of giving a shot to the new HaXe port of Flixel – http://www.haxeflixel.com/

Also seriously thinking of joining the http://onegameamonth.com/ challenge.


Detective Darwin – FINAL

Posted by (twitter: @jarnik)
Sunday, August 26th, 2012 10:21 am

Detective Darwin is a private investigator, a single human stranded on a planet full of blobby aliens with sophisticated cycle of evolution.

Followed by his alien assistant, Mendel, and using his amazing skill of relation deducing, he solves various cases in order to fix broken families.


I could not resist and instead of making a simple game, I made it too complicated…

The core idea: aliens have certain properties (leg count, eye count, colors…), there are specific rules of inheritance for each of these properties. Your task, as a detective, is to find a certain alien within a given group, using these rules. It might be a long-lost children,  elderly parents or step-brother.

I had fun, might be fun for you as well, if you have patience to get familiar with the rules.

Created in less then 24 hours ( managed to attend an afternoon bbq session ).

Good luck to everyone else – even if you didn’t manage to finish your game, I hope you had fun, cause I certainly did!


Detective Darwin in progress

Posted by (twitter: @jarnik)
Saturday, August 25th, 2012 1:01 pm

After a delightful barbecue afternoon with friends, I’m back to work on my LD entry :)

Randomly generated aliens:


Detective Darwin is a go!

Posted by (twitter: @jarnik)
Saturday, August 25th, 2012 1:33 am

It’s 10:30 am in Prague, I’ve been pondering the game ideas since 8am and it seems I’ll be making a noir-styled evolutionary puzzle game :)

Obligatory food photo – yesterday’s sushi leftovers for breakfast:

I’m in!

Posted by (twitter: @jarnik)
Wednesday, August 22nd, 2012 5:32 am

… and it’s gonna be my 8th time (including 2 miniLDs).

  • Code: haXe NME (rocks even more with every update)
  • IDE: vim (I’ve managed to integrate ctags for haXe, so yay! code-aware autocompletion get!)
  • Graphics: GIMP
  • Sound Effects: SFXR, Audacity
  • Music: autotrack

After two successful LD coops (with 2 different artist), I’ve decided to try it in a solo-mode once again.

Lately I’ve grown fond of aiming for a simple concept, that could be built within 6-8 hours, mostly succeeding. It’s enough time to build a simple prototype or toy, feeling like a part of a LD crowd, but it won’t eat your whole weekend.

Let’s have fun!

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