Honestly, really good feedback!! We have a lot more planned. Shark guy and Chiro's 'solo' act will be added as their own scenes to the earlier areas. But to your main point, the main issue is art takes a LOT longer than programming does in most cases. That's one of the reasons we re-used our enemies.
As for Chiro having the ability to instigate, while I understand it I honestly dont know that we'll go that direction (I dont make those decisions) as it seems out of character for her.