Thank you for being willing to give it another go, with another hour or so it could have been at least a little more polished.
The aim is to control the two characters and collect abilities from the monitors, and use those to reach the end plates to finish each level.
You can swap between characters with "left shift".
You can collect abilites with "E". Each character can only have one ability at a time, if you pick up a new one the old one is replaced.
The Jump ability uses, Space. The Carry ability uses F and G to pick up objects and place them.
You can use that to place the blue object on the scanner to open a door.
And finally the Hover ability uses "C". This did have an associated sound effect to help distinguish it was active.
One bug not fixed for the game jam version means both characters need to touch the same plate to progress.