I've played your game for a total of like 20 minutes; I don't mind trying it again.
R is for Reload I don't know why people keep talking about it being reset lol (seriously though, are you sure you want it right next to the action button?)
Lol, didn't think about that, you're probably right.
You found many more buggs, thanks. You were not supposed to be able to push the block while on a different side. You also put a box inside another box of the other side and they counter each other, which means there's no collision, but the box is still visible on one side, when it should just disappear. You couldn't find a solution probably because you didn't know what was a bug and what was supposed to happen, but you were on the right track. If you think about it, you could find a way of getting that corner cube which you took by means of bug.
Thanks so much for the testing, seeing how someone else thinks and approaches problem solving is really helpful. I think I'll add a mechanic where boxes can't be pushed against some walls to prevent someone having to restart all the time because they don't know if they've messed it up.