Actually, there is an advanced and simple mode. But why not a professional mode, a mode where values instead of being:
How fast is this enemy? A: Slow, B: Normal, C: Fast, D: Superfast
Would be something like this: Insert a value speed for this enemy.
Imagine things you can do, for example instead of normal (For example, 5) and slow (for example 1), put like 3.45 and the speed will be between slow and normal.
I don't know, but this feature I think will do good for PB