About concalf (twitter: @concalf)


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Blood Sacrifice

Posted by (twitter: @concalf)
Monday, August 29th, 2016 12:34 pm

Defend your civilization against the impending doom!
A strange, ancient device has the power to do so, but it comes with a terrible price:
In order to power the cannons, a blood sacrifice must be made!


Try to survive 20 meteors and don’t forget: A lonely creature is not enough to keep the civilization alive!

The Needs of the Many Outweigh the Needs of the Few
— Spock in Star Trek II: The Wrath of Khan

Link to the entry:


Here we go! Shapeship!

Posted by (twitter: @concalf)
Monday, April 18th, 2016 5:41 pm

Build your ship, shift between the 3 shapes and conquer the universe! Well, you know, whatever universe there is in 3 days :)


Please Play & Rate here :-)

Shapeship – one more day to go!

Posted by (twitter: @concalf)
Sunday, April 17th, 2016 4:52 pm

The idea is to shapeshift a space ship to align weapons and armor, playable but still a lot of work to do …



Preview playable here but remember: this is an early build, it may break at any time :)

No Space For Cows submitted!

Posted by (twitter: @concalf)
Monday, December 14th, 2015 11:24 am


Space is no place for cows – help the little cow to escape before it is too late!

Play & Rate @ http://ludumdare.com/compo/ludum-dare-34/?action=preview&uid=41148

No Space For Cows final day status

Posted by (twitter: @concalf)
Monday, December 14th, 2015 3:51 am


One Day left, looking good. Some sounds are missing and pacing is a bit unbalanced. Maybe add some music but I think it is mostly ready for submission!

Day 1 Progress – No Space For Cows

Posted by (twitter: @concalf)
Saturday, December 12th, 2015 3:07 pm

ld34_cowSpace is no place for cows! The Cow is growing with each pickup, the planet prepared to do so. Two button controls … check!

Hydra Confusion Post Mortem

Posted by (twitter: @concalf)
Monday, August 31st, 2015 10:55 am


For the first time in our 4 entries to Ludum Dare, we managed to jam at the same location – at least for one day. Funnily enough, that took some time off our development time as we first had to fight an only partially working monitor – the first monster to overcome. Now to …

… the good

  • Idea and gameplay. I think managing hydra heads with different types lead to an interesting gameplay and we are quite happy about that.
  • Using libgdx and ashley. It helps to use things you are already familiar with and use library code you already created for other games. As ashley is concerned, we are still experimenting with it and component based programming is quite new to us (although already experimenting with it in LD32). The general design and organisation of code can be especially challenging.
  • Graphics. The overall graphics and aesthetics are a plus for us. We both are no designers so everything that does not let you want to rip your eyes out is a win. (and takes a long time to create)

… the ok

  • Game progression. As the jam went on and time flew by, there was no way we could implement enemies to spawn heads by damage as originally intended. So we settled  for the easy way (the programming hooks were already there) and spawn heads on mistakes which added a nice snowballing effect. But we should have also made something score bound as the comments suggested because a good player will actually have to make mistakes on purpose to get a more challenging experience.

… and the bad

  • Clearly sound & (the non-existent) music. It just was not enough time to search for good sounds or hope for the best in bfxr. To be honest, for us sound is the hardest thing to do.
  • Fixing weird hotkey behavior in browsers. Especially the search-as-you-type feature in Firefox was a pita to deal with. As a quick and dirty post jam fix, we catch all key presses on the page which to be honest is quite irritating (no tab, F5 … we could filter them but i think it will do for now)



What is this thing?


Evolution of hydra


As always, it was a great fun to take part in a #LDJAM. There is always a lot to learn. Don’t forget to try and rate our game.

See you next time!

Hydra Confusion

Posted by (twitter: @concalf)
Monday, August 24th, 2015 5:54 pm


Finally the hydra has emerged. Keep all heads happy. Hydro, Zebi and Burny are waiting.

Have fun and please play and rate here!

… time to go to sleep now



It is not easy to be a Hydra

Posted by (twitter: @concalf)
Sunday, August 23rd, 2015 3:07 pm

Many heads, many needs – it’s hard to get your heads together


Still a lot of work to do!

Our Unconventional Weapon of choice: Cows!

Posted by (twitter: @concalf)
Monday, April 20th, 2015 1:26 pm

Yesterday we were not sure if we would join the LDJAM, but doing a small project with partly existing assets is sure better than nothing!

Scare cows to get rid of these pesky campers!


Entry: http://ludumdare.com/compo/ludum-dare-32/?action=preview&uid=41148

Url: https://www.concalf.at/ludumdare/LD32/


Screen Escape git time lapse

Posted by (twitter: @concalf)
Tuesday, December 9th, 2014 3:12 am

Time lapse video of our git repository of Screen Escape

Even for a small project don’t forget to use source control, especially if you are on a team!

When everything is done and submitted, watch your history and relax, you deserve it!

But start playing and rating games soon :)

Screen Escape released!

Posted by (twitter: @concalf)
Monday, December 8th, 2014 2:01 pm


After a wonderful, surprisingly stress-free LD31, here it is:


This time available for Web, Desktop (jar) and Android (Play Store)!

Go Go Progress

Posted by (twitter: @concalf)
Sunday, December 7th, 2014 11:24 am

2 Days into the Jam, time for a quick update (in crappy quality :D)

First LD Jam, done for now

Posted by (twitter: @concalf)
Monday, August 25th, 2014 2:06 pm

Get it out of here


It is getting late in the EU, so let’s submit the game!
After ups and downs and changes over changes in the gameplay here it is:

Entry: http://www.ludumdare.com/compo/ludum-dare-30/?action=preview&uid=41148


We are in the Jam!

Posted by (twitter: @concalf)
Friday, August 22nd, 2014 7:29 am

… for the first time, two man team.

using following tools

  • libGDX
  • eclipse
  • gimp / photoshop
  • inkscape
  • bfxr
  • git
  • maybe spine

What are the chances to finish something on the first attempt? we will see 😀

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