Hello there!
The game has a great potential, really. But of course it has a ways to improve.
First, in my own opinion, graphics can be made better - these walls with a HUGE squares (pixels) does not look good, and a grey rectangle as a "chest" obviously needed to be drawn as a chest. Next, the font is decorative but very hard readable. Many of HUD elements are too small, and some item icons (Longbow, Mace, Arrows) are missing. And last, adding some animations for movement will be just great.
I would like to recommend to play/watch "Shining In The Darkness", a great 16-bit dungeon crawler released for Sega Mega Drive 2 in 90s, so you will see the clear idea of what Your game would like to be. I really would love to see something similar in "Sundered Helix" in future builds. Keep Up the Great Work!