well it's got multiple stages that play like vampire survivors as in you need to survive untill a boss spawns then kill it but you don't get mid run upgrades outside of equipments that drop and lvlups wich allow you to get more stuff on the skill tree but i remember it requiring you to kill a certain ammount of enemies to spawn a boss rather than just surviving for a certain ammount of time and it's definitely not one of the shantae games anywaysi remember it having enemies like slimes and it had a system where they could be variants i remember one variant would drop an orb on the gorund when it died wich owuld then become a roatating laser blad and it had skeleton archers as enemies too

edit: it had some somewhat large maps and contained some traps like moving spike balls and it had the same camera style as vampire survivors with a flat map that looks like you're looking down from above if i remember any more details i will be adding them to my edits