Yeah the only control is to press space
I also used the theme for the controls - you only have one button, space. It's an endless runner crossed with action platformer type thing. Have to avoid, tank and reflect your way for as long as you can!
https://itch.io/jam/gmtk-2019/rate/461900
If you give it a play - make sure to leave a comment and I'll play yours too. I'm spending my day playing games today!
I was going for a hard game with only one button as comfortable input. Space. Check out my game.
https://itch.io/jam/gmtk-2019/rate/461649
Browser version in comments.
Yes! You need only one button to control in my game:
https://hobo-cat-games.itch.io/hobo-cat-in-space

A co op puzzle platformer where only one player can move at a time:
https://itch.io/jam/gmtk-2019/rate/461509
Please give it a try and some ratings and we'll try to get to as many as we can on this list!
My team took "only one" in the control direction with the idea that one controller controls everything on screen. It sort of evolved to the puzzler we submitted: https://bitdecaygames.itch.io/ka-bob
Nice entry, by the way!
I made something similar as well: Sole Survivor.
It's a top-down zombie shooter where you only use the space bar to play. The action performed by pressing space continually changes, so you have to plan carefully to avoid getting trapped. This was my first jam, so I would really appreciate some feedback!
Apparently the version of the game that I uploaded to the jam skips straight to the last level. If anybody would like to check out the proper version of my game, it is here: https://greencheese333.itch.io/sole-survivor-proper. I would really appreciate it if I could still get some feedback!