pretty good...but
It was good for starters, but here are a few things you need to fix for it to be very sucessful and worth passing the portal.
-Dont be so close on the battle. Zoom it out. Also most of the rpgs have more than 1 character. This was a demo and yes I understand only having mario, but if ur gona make a real one, have more than one, or make it where u get more through the story.
-Dont make the 'entering battle' and 'exiting battle' so long. When u defeat the opponent(s), dont do that 'special text effects' stuff. keep it simple. Try this. When you defeat all the enemies, make it sorta 'darken' (like an eclipse just happened after every battle) and make the drops, exp, ect (non darkened) pop up. As in you still see the characters in the background (shadowed out), but ur looking and interacting with the window that shows the exp, drops, ect.
- Again zoom out during the 'adventure' part of the game. dont make it so close. Also make sure to include (in the real game) first strikes and stuff. As in if u hit the enemy first, you get to deal damage at the beginning.
Besides those, just work a little on the overall flash technique, and u should do fine.