Haha, no worries man. You definately shouldn't feel bad. You actually brought up a good point that I need to display somewhere that its two player in the game before more people get frustrated with the controls. Maybe I'll just change the title to include that for now and come back and fix it after the jam.
I really hope you have fun playing it with your kids! I think they will have a blast on the platforming section. There is one "twist" ending that I thought I would mention to you though (nothing graphic or "R" rated, but more adult age themed). Just wanted to give you a heads up about that. Again, its all "PG" just might bring up some questions later on.
As far as the barrel role death spin. I brought it up to my brother and I think we figured out what is happening. There are these orbs that you can hit that give you a speed boost. They end all couroutines when you leave their trigger, but the dodging is done through a couroutine, so if your dodging after gettting a speed boost then the dodge function will never end. (There is a speed bost orb at the end of the training tunnel, thats probably the one you triggered) That was a really good find, so thank you. We'll have to go back and fix that after the jam as well.