This jam is now over. It ran from 2021-03-19 05:00:00 to 2021-03-22 05:00:00. View results


Mini jam is a 72-hour-long, game development jam for independent game developers that occurs every two weeks.

Mini Jam involves a required condition that is announced as soon as it starts to spice things up. Remember, limitation breeds creativity. You get the theme early, so you can plan ahead, Just keep the limitation in mind. This jam's theme is RADIATION. Remember, theme is purely inspirational and not required. Feel free to interpret it however you want.


The limitation is a special condition that your game must follow, but is open to interpretation. If your game does not follow the limitation, it may be removed.

Limitation: One Handed Controls.

This does not simply mean that your game can only use 5 inputs.  It is important to keep in mind that a hand has a limited range of motion and pressing multiple keys that are too close together or too far apart may be uncomfortable or even impossible (remember that you can move your hand around the keyboard). If you are ever unsure about your game's controls, just try playing it with a hand behind your back. 

Q: Is this one hand on the keyboard and one hand on the mouse?
A: No, this is one hand total.

Q: What about feet?
A: Hands only.

Q: What if I want controller support?
A: Controllers must also be used with one hand.

Q: Is this my left hand or my right hand?
A: You can choose to use either hand, just note that the left hand and the right hand allow for different ranges of inputs.

If you would like notifications when the Limitation is announced, join the Mini Jam Discord server.  Discord  -  Twitter


At the end of the Jam, there will be a rating period that lasts 5 days. Your game will be rated on:

Enjoyment - How much you enjoyed your time with the game.        
Concept - How interesting or unique the main focus of the game was.           
Presentation - How well executed the main focus of the game was.           
Use of limitation - How well the game incorporated the given limitation.


  • You may only make your game within the time frame, we do checkHowever, updates are allowed after the game has been submitted
  • No harassment of any kind.
  • Keep game content clean. No NSFW content, offensive content, excessive gore/violence.
  • You can use pre-made assets that were not made for this jam, like asset packs, or assets from older projects of yours.
  • Follow the limitations given.
  • Read the rules. Not reading the rules is not an excuse for breaking them.

Any games that do not follow these rules may be removed from the jam.


Participating in Ludum Dare? Be sure to join the official unofficial Discord server.

Want a fun and easy way to make games? Try out Ct.js! Ct.js is a free 2D game editor that aims to make programming fun and game development easy by its visual editors and well-documented code library. Available for Windows, Mac and Linux. Try it out here!