Some concepts for a new project

I'm taking a part making concepts for a project in development. This will be a 2d scroller game, where the player has to protect an ancient Portal in a constantly changing labyrinth, fighting large numbers of enemies.

The main character - a mighty Warlock, who protects the Portal and fights off the demon hordes

Close combat slow enemy demon, made of rust and blood of fallen heroes

Close combat fast enemy, gathered from the chumps and blades

Range enemy, shoots with different effects from the eye

Support, range enemy, posseses shadow magic abilities

A fakeshot from the game