Ok so my first impressions. I really like how you have the four difficulties right off the bat to choose from, and the explanations are also great. In terms of the menu, I think the style feels not very well put together, and the animations are a little clunky and lifeless. That being said I think the color palette is fantastic, it feels strange and mystical and ties with the theme of the game very well.
When 'MP' was first mentioned i had no idea what it was, but i assumed it meant mushroom points or something. It might help to explain some of the basics like that MP means health.
I think there should be a button to speed up text as well. Pretty standard. Also a fullscreen mode.
In terms of gameplay, I think it's PHENOMENAL. I can't wait to see what bosses look like, or later levels with larger areas, platforming, new abilites, puzzles, etc etc. The music is really really good, and this game honestly reminds me of metroid a little bit, being alone in an alien world with no idea what's going on. The graphics are incredible, i love the lighting and the enemies, the guides along the way. Really my only gripe is... Man this mushroom is slow. Please give him a dash or something like that, it would really help make the gameplay more fluid. Anyways this game is really sick and I hope it evolves into something even greater. :)