I hope you guys see this comment, I was touched when i learned it is made by a 11 & 9 year old . i am 16 and i started making gaems when i was your ages, it is a fun game adn challenging , and its impressive taht you made everything by yoursel. dont give up guys, there is a bright future in front of you, if you keep trying!!
as for the dad ,wow good job man , helping your kids to make this , getting yourself to learn bcz you know they can actualy make something is impressive, continue being an amazing and supportive parent!!