Dungeon of Zolthan (Steam key/Region free).

http://store.steampowered.com/app/463220/
Dungeon of Zolthan is a casual, arcade-style metroidvania platformer where your goal is to defeat Zolthan; a powerful mage that lives inside the dungeon.

Using an array of powerups and your own wit and guile, guide your character through Zolthan´s Dungeon! Dodge obstacles and projectiles, solve puzzles, and lay waste to your foes on your way to the final confrontation!

Features:
Good old-fashioned retro CHALLENGE!
Classic, time-tested platformer mechanics!
Metroidvania explorative elements
Puzzles
6 Powerups
40 Dungeon ´rooms´
4 Bosses