I played your submission and... it really needs more work.
The most obvious issue is the palette in the first half of your level. It's just way too dark, and difficult to see where your footing is. If you really want to go with a dark cave level, may I suggest using the Dark Room Spotlight, and brightening up the palettes for it? As it currently stands it creates unnecessary amounts of artificial difficulty.
Another problem is the time limit. I ran out of time before I ever made it to the goal on my first try, and had to complete it from the midway point. Granted, I was being cautious due to the whole dark room half, but an extension of 100 seconds would do a lot of good here.
Finally, I felt that your level didn't seem to have a focus. It starts off as a dark cave and then transitions into a grassland for the second half suddenly. The sprite/obstacle usage was just all over the place, and it felt more like you were just throwing around whatever you could find than actually sticking to a theme.
Consider my points if you have any interest in improving your level.
My Let's Play channel
(Current LP: Final Fantasy VI, MegaMari)