I tried it out, but I'm sorry, the controls were PAINFUL to use. I don't understand why I could move faster going backwards than forwards. There's too much friction on the ground and nowhere near enough once airborne. There's also an area in the first level where I got stuck and couldn't die either. I quit at that point.
Based on how the character moves, I assume you used a rounded collider yeah? That makes the character easily slip off platforms, which feels awful when the controls are already difficult to use. I suppose it fits the theme of the level being flooded though.
Last bit of feedback, it's pretty apparent in my screenshot that the door is out of place. Its style doesn't match the rest of the art. It'd take only a few seconds to make a black rectangle of pixels and fill it with red, but makes a huge difference in visual consistency.
