You guys did a great job!
It turned out a little too easy, but that's better than being too hard and unplayable. I really was expecting some kind of boss on the last portal, as it made that ambient sound. The sound also played during a fight, which gave me an uneasy feeling (in a positive way).
The map worked really well - it was a good idea to put it as the first menu item to access it fast. I'm also happy you didn't make the levels too big... I always fear of walking into the wrong direction and have like dozens of random encounters while walking all the way back.
The graphics are really lovely and I love the music, especially the battle theme! I can't wait to see the full game in the future :)