Likes and subs are appreciated!
Happy that this mod exists as the bosses are def the best part about this game. Might do this again with double spawns active.
(played on latest patch 12b)

Boss rush mod https://github.com/Hydraxous/BossRush...
ULTRAKILLtweaker https://github.com/wafflethings/ULTRA...
ULTRASKINS https://thunderstore.io/c/ultrakill/p...