Ok. I love the concept retro/gameboy "Castlevania" style. I have to disagree that this controller/input setup is most intuitive. The arrows/WASD is the standard for movement but having W as jump and E as attack with the arrows, felt a little inverse to me personally....I would consider adding an alternate input system and/or gamepad to stand out and account for "all things", (ie: add mouse click for attacking.... Space as jump and E as interact but that is just what I come across most commonly....)
All this being said I like the look and sound and feel, and clearly going for classic metroidvania here