This is very nice. Challenging, fun and well made. Love it.

when both players are still alive it is this kind of mentally tickling experience I love to play. it reminded me a bit of the mobile game "Duet" which is one of my alltime favourite games, so well done in that regard ;-) 
also: great color scheme, I wonder if there are other games out there that would make use of such bold colors...*cough!**cough!*

This is a really interesting concept, I found it interesting that if one of your cubes died and then respawned it was sort of asynchronous with the other, in a bigger game that could have the potential to almost plan your deaths. Not sure if it was intended but it was cool nonetheless

This was simple but cool, my brain had a bit of a meltdown trying to control both. once i ran out of lives it was much easier as i only had to focus on one screen.