Thank you for your comment, and your return, much appreciated. The game is very buggy indeed few things could have been done better, i will not enter in details. I will change the description into a much clearer than it is right now, about cooperation. For design ideas we had some ideas to improve the cooperation, but i don't think we will continue this project for personals reason of team's member. At the beginning we wanted to make some kind of mix between tetris and a race game, if it help to have a better view on our project's intention.
Edit: The day after, i didn't publish correctly the devlog, with some of the issue you and we noticed afterward.