Very impressive for a 48 hr project (and under 10MB!) The hand-drawn art and animation is excellent -- it's almost like an interactive Golden Axe comic book. I found it hard to gauge how useful the slimes were -- they may have softened up a few enemies for me, but I don't recall any of them killing any for me. They seem to die easily, too (but then again, they do have bodies that are pretty much made of Jello so that kinda makes sense).
Other things I liked is how the camera zoomed in a little to bring you closer to the action and the spinning into the black hole animation at the end of each level.
Only bug I noticed is that one time I got my character stuck off-screen (far right) and couldn't get him back into view. He got killed by skeletons and was able to respawn like normal, so it wasn't game-breaking.
Yet another good game by Super8BitRafa!