The Citadel

Descent into the Depth Of the Citadel

Fight through 6 Episode, 30 action packed levels (and additional 6 secret levels) to defeat 6 bosses.
Carry 14 different types of weapons, and every weapon have unique 2ndary fire. Also you can grab 3 types of single-use special weapons.

・Unlimited Continues.
・You can continue trying until you break. Also, you can go back to a hub area if you find the episode is too difficult.
・No Hitscanner, All Projectiles.
・Every Enemy Attack Can Be Dodged.## Kick the Opponent to Lava.

・Light-weight enemies can be kicked and stunned. You can also make them fall into a bottomless pit or lava.## Upgradable Weapons

・Some weapons can be upgraded or switched to the superior versions.## Gibs!

・Enemies explode into chunks of meat or metals when they die.## Optional Features: Leaning and Weapon Jam

・Leaning can be enabled in a option menu. Dodging is not the only way to avoid the enemy fire.
・Weapon condition features can be enabled in a option menu.
・Automatic weapons can be jammed in a middle of a battle, and they will be eventually broken.

Source:

Steam Store Description