[butlike]

You could just package an arbitrary 100 levels, let the player play them in any order, then give rewards for 10, 20, 30, 40, etc. levels completed/mastered.

[Feathercrown]

This would still benefit from a difficulty rating system or order

[Forgeties79]

Or go full on kaizo Mario and make it a random room out of the 100

[snackdex]

naw im looking to have fun, not cry

[snackdex]

something in me loves progressively harder levels