I would like to propose creating a new category called "Beat level 17 (mode A)" and these are my reasons:
This game has 5 types enemies (2 of them are upgraded versions of others) but the game doesn't show them from the beginning it actually starts with only 2, here is a list of how they enemies appear: Buzzbee & Creepy (worm/snake) appear from the beginning. Beespy/Queen Buzzbee (counter explodes) appear after round 3 Green Attacker (horizontal attacks) appear after round 6 Red Attacker replaces the Green Attacker in round 12 Fire Butterfly replaces the Buzzbees in round 15
In short words, the last enemies that the game adds happens in the °6 loop and after that nothing new appears, for this I think that's a good point to consider it as you defeated the game.
I think it's interesting
But someone would have to route it out first