Thank you reply.
One screen split to multi level spawn enemy are good way!Even not use to design Roguelite stytle game still are good design.
Picking from a "deck" of options to avoid repetition
Sounds great and easy to try, like can set some random or design enemy patten to one stage and play it by time.
It was good way to make special and chanllage stage.
Learn a lot of good design from you, thank you :D