See PUTRID SHOT ULTRA in vid form, watch here.
"A chaotic shoot-em-up roguelite with magic spell casting. Defeat enemies with your gun! Stack tons of passive spells that trigger when you shoot while weaving your unique active spell in between. Blast your enemies with gunfire and magic spells while you dodge through the rubble."
At a glance categories:
Action Roguelike, Arena Shooter, Retro