One thing that would be nice to add, would be automatic stat increases. Like if you successfully do free kicks, score goals, or intercetps. It should increase its respective stat instead of having to only train them.
There really needs to be some more upgrades. Much more oxygen and storage. Its a great game concept though, just needs to be expanded a bit more. Thanks for giving it to us :)
Glad you enjoyed it! By the way, Free Play gives you a much larger amount of both oxygen and storage capacity, if that's what you're looking for.