This isn't half bad. ^_^
You do have a few sound errors (such as 2 sounds overlapping, or the sounds being too loud. Lowering the volume, and fading music in/out would help considerably), and there is an issue with sprite-mixing (where you use too many sprites from games that have sprites that look different. Try comparing that MM7 style Maple sprite you used (and didn't credit for. ALWAYS credit custom sprites) to the JUS style Link).