itch.io

Awesome!. I came up with this idea few days ago and searching the web found your game. I was thinking in a twist, like a player manage the block and another manage the platformer. 

Which engine or library did you use?

Awesome, I came to the submissions searching for this :) . I had a similar idea but didn´t join the jam.  I though the game was set in the snow and wonder why I died not touching anything, later reading the description realize of the move limitations during the day. Looking forward for more updates.