I think the game might still be wip or something broke in my playthrough. Only the first dark cube was shooting bullets and reacting to getting hit by bullets.

Otherwise,  I kind of see colors of the rooms applying to the thing, and I could imagine that something was planned for this one, even if it didn't work all the way.

To be honest, I'm not sure what happened.

I think it could use some more work. Only the first grey cube actually fired back. The game could use a health system and hud, and definetely some more polish. 

No worries, just spend a little time polishing the game after the jam. If you don't know how to do something ask around on forums or search up youtube videos. I recommend watching some Brackey's Tutorials which can help with a lot of specific features especially things like Health Bars, Menus, etc.

I really liked flying around and shooting the boxes, but there isn't a win screen or dying (i'm bieng a total hypocrite if your talking about my game though) but I think with more time could be even more fun